R
which sentence contains a pun?
a.
a humble life of peace and quiet is better than a splendid one with danger and risk.
b.
it is better to be thought a fool than to open one's mouth and erase all doubt.
c.
i could not remember how to throw a boomerang, but it eventually came back to me.
d.
she shimmied on the shiny dance floor in her sheer and shimmery shoes.

I believe it is C.

Explanation:

Hope my answer has helped you and if not i'm sorry.

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.