GMAT Sentence Correction (SC) | Re: At a time when Queen Anne was so ill that she had to be

Whigs is plural; Hence we need their; B D are gone; B and D also use unidiomatic either and on after hovered.

Among A,C and E

A uses was hovering when a simple past tense would do; not a concise choice. The comma after and is incorrect; it should be before and.

C there is no comma before and; there is no need for commas before and after nervously

E, is the best choice