问题详情

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．diversity… ingratiated
B．dearth… belligerent
C．gamut… overwhelmed
D．appeal… mortified
E．periodicity … exhausted请帮忙给出正确答案和分析，谢谢！