The answer would be D. 30s (apex)
The answer is : B. How conditioning determines behavior
Gestalt psychology study how human mindset affecting that human as a whole.
Gestalt psychologist believe that someone who condition themselves with positives mindsets, will generate positive behaviors in overall aspect of their lives. That's why option B. is the most suitable answer
I think (C):600
Explained: other sources say there is about 650 but if you count the muscles within a complex muscle then about 840
