Yes, of course, you are right.
In fact, there is no correct answer listed in the book for this question.
The correct method name is "startAsync()", but it is declared in ServletRequest interface (and not in ServletContext as in answer "B")
I'm still reading the book, and in general I'm pretty satisfied with it.
Author definitely is good one and knows what he is talking about.
But the big number of typos is annoying. Wait till chapter 11 where even number of correct answers of several questions is wrong.
And support from the official site of publisher - http://www.garnerpress.com is pathetic.
In fact there is no such - Third Edition of the book is not listed there, so no errata, no download bundle, nothing ...
P.S.: OK, to be fair, download bundle of Second Edition is available, but ... why? is it so difficult just to upload and host one war file?