Which of the following is a sex hormone?

Which of the following is an example of decision making?

a. She chose the job that paid less but offered more opportunities for advancement. b. He felt the teacher was pompous, arrogant, and self-centered, just like himself. c. She loves the taste of fresh fruit on her morning cereal. d. Though it wasn't true, he told people that the reason he didn't go to graduate school was because he couldn't afford it.

The form of research that identifies cause-and-effect relations is called a(n) __________

Fill in the blanks with correct word