Q1: When I was answering this I was not convinced with B because it used "best defined as", the tone of the passage seems to just say "more satisfactorily". However, by process of elimination B is better than the other choices.
(A) The author believes the opposite. This definition dominates together with the "interest definition" and then the author suggests a better definition to the two dominant thought. So this is not the main point.
(B) This is the definition introduced by the author. However, I am not sold with this because it says "best". But let's keep this for now.
(C) This definition, like in A, is dominant but not the a good definition for the author. Thus, not the main point.
(D) Civil Rights are just used to make illustration of the definition of Ethnicity for the author. Not the main point.
(E) Now this is almost correct except for "incompatibility of two definitions" the author even suggests that this two can reinforce one another. False based on the passage.
Q2) The author of the passage refers to Native American
people in the second paragraph in order to provide an
(A) The second paragraph is an example of the authors definition wherein "culture and ancestry" is used for emerging issues and used also to induce solidarity. An essential human need is different from emerging issues such as voting. That is definitely not essential human need. False.
"how ethnic feelings have both motivated and been
strengthened by political activity"
At first I did not get this as the correct answer until you read it again since I'm not a native English speaker. Ethnic feelings motivated political activity and have been strengthened. If you will read the second paragraph again, it says there Mexican Americans used Ethnic feelings to induce solidarity at the same time help mobilize constituents (motivate political activity). This is the answer.
Impossible is nothing to God.