...women are requesting mammograms even as researchers find...

[Volcano1985]

_______ women are requesting mammograms even as researchers find ________ cancer risks in the environment.

A) Lesser / much
B) Fewer / more
C) Most / many
D) Less / little
E) The fewest / the least

Could you explain me why the key is B?

[Mister Micawber]

Well, 'less' and its forms still should not be used for count nouns, according to most test makers, so that eliminates A and D. C and E are logically wrong, and 'the fewest' sounds grammatically off to me as well.
_________________
Native English teacher at Mister Micawber's

[Volcano1985]

What does "even as" mean in this sentence?

[Mister Micawber]

'(surprisingly/ironically) at the same time that'
_________________
Native English teacher at Mister Micawber's