Please answer the following question by reasoning step-by-step.
How would a human be feeling if they were smiling and whistling?\nOptions:\n- homes\n- good mood\n- greek tragedy\n- sad\n- shopping mall

good mood
Good mood is a mental state characterized by positive mood parameters.

Smiling and whistling are positive mood parameters.

If a human is smiling and whistling then he is in good mood.

.

So, the final answer is good mood