</span><span>Cumplió is the conjugated past form of the verb cumplir in the form of el/ella/usted. We know that this sentence is referring to the past, because it uses "ayer" which means yesterday. Cumplir means to turn, and is used when talking about birthdays.
The correct phrase is </span>Mi abuelo cumplió setenta y dos años ayer My grandmother turned seventy-two yesterday.
A. The answer is cumplió. Cumple is referring to someone else. Va a cumplir is referring to someone who will be turning a certain age. Cumplía is someone who turned a certain age.
