Which of these common topics invites you to examine the feasibility of what has been proposed? a comparison b relationship c circumstances d testimony

C. Circumstances

Circumstances ask you to examine the feasibility of what has been proposed.  For example, in an essay about the feasibility of flying cars in the future, you might argue that cell phones were unthinkable in the past.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

what's the rest of the question