Jet lag is primarily a result of ____.?

In a study by Carré and colleagues, men played a computer game against a fictitious opponent. Researchers varied the rewards and costs as well as provocation from the opponent. Results supported the idea that

A) testosterone levels will vary depending on situational factors. B) men who produce high levels of testosterone are more aggressive. C) testosterone levels are non-responsive to situational factors. D) aggression-levels vary as a response to situational factors rather than testosterone levels. E) aggression depends on serotonin levels to a greater extent than testosterone levels.

Secondary traits are changeable aspects of personality, such as musical preferences, habits, and casual opinions

Indicate whether this statement is true or false.