Please answer the following question by reasoning step-by-step.
Which of these sentences doesn't make sense?\nOptions:\n- Sentence A: "There are 50 states in the USA."\n- Sentence B: "There are 50 cities in the USA."\n

Sentence B
Since there are 50 states in the USA, and states are made up of many cities, there are much more than 50 cities in the USA.

.

The answer: Sentence B