Hello!

The subject of this sentence is "Yo" (I), so we must use the first-person singular conjugation.
Thus, the correct conjugation ends with an "o", or "Pruebo". Choice A is the correct answer.
Answer:
Le provocó intentar nuevas actividades y conocer a más personas.
Telephones back in 1950 did not except credit cards
D. Primo because the sentence says “the son of my uncle is my... cousin :)”