Which sentence below contains an oxymoron?
a. fair is foul, and foul is fair:
b. hover through the fog and filthy air.
c. when shall we three meet again

he has become more humble and patient in battle.

i think its c

independent

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.