Paraphrase this :

the purpose of a checking account is to provide a very liquid, simple, convenient, and secure way to manage funds coming in (deposits) and those going out (withdrawals)

A  checking  account is meant to be a convenient and simple way to make deposits and withdrawals

Explanation:

from the political point of view it could be said that the candidate   is an effective speaker because she takes a strong position on the issue. it is an open discussion but probably she is making a presentation and can choose which subjects she wants to address. she is very likely to attain her aim which is to convince voters to accept her proposal.

answer

the answer is a