Plz !
which of these describes the effects of the author’s use of metaphor in this statement from paragraph 4?

though a registered democrat, jasmine was a fount of political knowledge.
a) it portray the speaker’s sister as irresponsible.
b) it make the speaker's praise for his sister more authentic.
c) it explain why the speaker’s sister is away from home.
d) it describe the speaker’s relationship with her sister.