Answer:
The right answer is, Compramos.
* Mi papá y yo compramos un regalo bonito para mi mamá en la tienda de recuerdos.
Step-by-step explanation:
The past tense indicates actions carried out in the past but whose end in the present has not yet been defined, taking into account the above we must identify the person, gender, number and time in which a sentence is developed to conjugate in a way logic the verb and be consistent with what is being expressed.