In the beginning of his speech, ryan asked the audience a rhetorical question. at the end of the speech, he provided an answer to the question. which method for creating effective introductions did ryan use?

Ryan used a method called Hypophora. This resource consists of asking a question, with the aims to create interest and inquisitiveness among the audience and, by the end, explaining or giving the answer to that question.  

This resource is not a rhetorical question because the narrator or speaker does provide the answer, in contrast with rhetorical figure where the answer is implicit.  

the third answer is correct (c).

the laws that regulate the financing of political campaigns seek to guarantee the smoothness of funding so that there is no abuse of electoral economic power and to avoid the capture of future politicians by the donors.

this is because donor agents have their private interests that are not necessarily the same interests of the society that elected politicians must defend.

thus, interest groups should seek their interests within the legality of lobbying practices that are regulated.

using the bering strait was the best transportation system.