Choose the best spanish equivalent to the phrase. their relatives can visit soon. sus parientes pueden visitan pronto. sus parientes puede visitar pronto. sus parientes poder visitar pronto. sus parientes pueden visitar pronto.

The best Spanish equivalent to the phrase: their relatives can visit soon, is:

Explanation:

Firstly, you must know that "sus parientes" can be replaced by the personal pronoun "ellos" or "they" in English, so, the conjugation of the verb "poder" in Present form in Spanish is:

How the personal pronoun used in the sentence is "ellos," the right conjugation of the verb is "pueden," next, after a modal verb (how is the verb "poder") if is used a verb, this must be in its infinitive form, in Spanish these form ending in "ar; er; ir," in this case the verb is "visitar."