Considering the________of available options for investing one’’s hard-earned retirement funds, as evidenced by a plethora of daytime television advertisements aimed at appealing to the incapacitated senior, you may well find it difficult to avoid feeling________.

A．describe in detail how the principles of homeostasis apply to living things
B．propose a modification in the most widely accepted theory of homeostasis
C．compare and contrast the role of positive and negative feedback in maintaining various applied systems
D．discuss the concept of homeostasis in the abstract and relate some of its most important principles
E．provide examples of systems which are ruled by the principle of homeostasis

A．passionate
B．critical
C．sedulous
D．interesting
E．considerable