While bear markets certainly hurt institutional investors, they are potentially devastating for individual investors, whose nest eggs - in many cases representing the sole source of retirement funds - can plummet or even vanish entirely.
a. they are potentially devastating for individual investors, whose
b. they can potentially devastate individual investors in that their
c. for individual investors they are potentially devastating, because their
d. for individual investors, it is potentially devastating in that their
e. it can potentially devastate individual investors, whose

A. they are potentially devastating for individual investors, whose

Step-by-step explanation:

B. they can potentially devastate individual investors in that their - Meaning Issue. Initial sentence bear markets are devasting individual investors it doesn't talks about capability. Option B refers to capability.

C. for individual investors they are potentially devastating, since their Meaning Issue - In Original sentence "whose" describes institutional investors and we dont know whether nest eggs is reason for this.

In D and E pronoun-antecedent error. It cannot refer to plural Bear Markets.

answer: it depends on what the tax percentage