Read the following context and choose the correct option to answer the question.
Context: Weight gain is a complex issue. But there is little doubt that the current food environment in Western countries – heavy in highly processed salty, sugary, and fatty food – has a big role to play. Most of the salt eaten in our diet has been added to food in the manufacturing process. This is in contrast to the small amount of salt naturally present in most foods or what is added at the table or at home in cooking. Salt can be a desirable taste, increasing the palatability of foods in addition to helping preserve it; that’s why it is commonly added in processed foods.
Combining salt and fat together is thought to be a potent combination in helping to promote passive over-consumption foods. Just think of how moreish salty chips can be. Having a greater liking for salty and fatty foods is associated with eating more kilojoules overall, uncontrolled eating, and overweight in children. This link between overconsumption of food and its degree of saltiness is considered stronger than having a liking for sweet and fatty foods.
Teasing out further how salt may influence the over-consumption of fatty foods, sensory researchers from Deakin University recruited 48 healthy adults to take part in a tasting panel. Over four lunchtime sessions (following on from a standardised breakfast that morning), each person ate a meal of macaroni and cheese where the fat and salt content had been manipulated. The four meal combinations were low-fat/low-salt, low-fat/high-salt, high-fat/low-salt and high-fat/high-salt. Participants were encouraged to eat as much as they wished until feeling full. Eating rate, meal agreeability, and subjective ratings of hunger and fullness were also taken.
Salt promotes over-eating
Eleven percent more kilojoules were consumed when the meals eaten were high in salt. And this was irrespective of if the fat content was high or low. The fat content of the meal didn’t result in people eating more food by weight, but because of its greater energy density, that meant more kilojoules were eaten.
Question: The writer believes that:
Options:

A. Salt does not promote over-eating

B. not enough information

C. People should eat more salt

D. Salt promotes over-eating
D
The passage states that the addition of salt to food can make it more palatable, which contributes to overconsumption. It also discusses a study in which people ate 11% more kilojoules when they consumed meals with high levels of sodium compared to those who ate low-sodium foods. Since these statements are consistent with each other and both point towards the conclusion that salt promotes overeating, D is correct. The fact that there was no difference between participants eating salty or unsalted high-fat foods does not undermine this statement; rather, it provides support for Option D as well because fat content wasn’t shown to increase consumption either once whatever effects were due to sodium had been taken into account..