Which pair of words are synonyms?

a ephemeral--evanescent

b euphonic--conspicuous

c bromide--anodyne

d indigence--opulence

Celia was: a slave tried for killing her master while resisting a sexual assault. a slave who became famous for other slaves escape via the underground railroad. the pen name of floride calhoun, who secretly criticized her husband, john’s, views on slavery. the name used to signify a southern plantation mistress in writings about the institution. a character in uncle tom’s cabin.