Ozymandias is first and foremost a metaphor for the ephemeral nature of political power, and in that sense the poem is Shelley's most outstanding political sonnet, trading the specific rage of a poem like “England in 1819” for the crushing impersonal metaphor of the statue.
I believe B would be the correct answer if I am right if not I'd think C.
It would be B because "You seems happy about the cold weather" does not make any sense but "You seem happy about the cold weather' does make sense.
Hope this helps!