Respuesta :
B) He promised to love her in sickness, in health, in poverty, and in wealth.
The correct answer is B. He promised to love her in sickness, in health, in poverty, and in wealth.
A parallel structure refers to a sentence that contains the same form of a word or phrase throughout. If you look at sentence B, the parallelism can be observed in prepositional phrases in sickness, in health, in poverty, and in wealth - all of these phrases contain the preposition IN and a noun.
Sentence B is also correct regarding commas - there shouldn't be a comma immediately after the pronoun HER.