Answer:
The right answer is, B. Vendrían.
Todos mis parientes vendrían al crucero si yo fuera rica.
Step-by-step explanation:
Because the sentence is being narrated in the first person and making reference to several people, therefore we must take into account the number, the time and gender in which it is spoken, in this way we can logically conjugate the verb in the sentence and that it has concordance with what is being expressed.