Mary was singing because she wasn't happen and she wanted to do what?\nOptions:\n- being heard\n- sore throats\n- hoarse voice\n- change in mood\n- sad
Please answer the following question by reasoning step-by-step.
change in mood
Singing leads to mood change of a person.

A person who is not happy likes to sing to change his/her mood.

.

The final answer: change in mood