"Like Mabee and Painter, Margaret Washington provide" and "But in contrast to Mabee and Painter," says there is a slight difference between the "mabee & painter" and margaret washington's work. thus (i)"naunce- a subtle difference in meaning or opinion or attitude" matches appropriately.
"process of making historical judgments from flawed(i.e., mistakes) sources" - smooth and unerring(i.e., always accurate) does not matches , whereas tricky(i.e., deceive people) somewhat matches in the context.
"acknowledge - reliability of her sources" which states washington does not trick her reader's and admits the mistakes of her sources. only problems matches (mistakes)

thanks a lot

Carcass

Hello!

Could you please provide an alternative explanation of why is it nuanced?

Kind regards!

Hey,

Like Mabee and Painter, Margaret Washington provides a much more accurate, (i)___ , and historically contextualized view of "Sojourner Truth" than was available in the heyday of second-wave feminism in the 1970s and 1980s.

So it says that, Washington provides much accurate and refined version than was available in the prime of second wave feminism.

Hence, nuanced is the correct choice.

Please ask if the doubt remains.

I would not explain better than rx10 made