When we see "according to the passage" in the question stem, we know we can justify the correct answer with a line reference from the passage.
The keywords in the stem tell us where in the passage we should look. "CAW members" were discussed mostly in the 1st paragraph (and then the 1st sentence of the 2nd paragraph).
A) we can justify this with lines 8-12. Plan members can use lawyers outside the plan.
B) there's no support for the idea that members believe the staff lawyers are "as high quality as" other lawyers.
C) the word "most" is usually wrong in reading comp. (as well as its synonyms: generally, usually, probably, tends to) nothing in the passage indicates what "most" members do.
D) lines 8-12 contradict this. Outside lawyers can accept the plan's payment as "payment in full" OR they can demand additional payment from the plan's members.
E) no way to know whether or not this is true from lines 1-4.