select the correct answer.\nwhich word best completes this sentence?\nluis: fui al mall para comprar un…

Brief Explanations:

The sentence "Fui al mall para comprar un regalo para el cumpleaños de mi hijo y ____ el regalo con mi tarjeta de crédito" is in the preterite tense (past tense) and the subject is "yo" (implied as Luis is speaking about his own action). The verb "pagar" (to pay) in the preterite tense for "yo" is "pagué". Wait, no, wait. Wait, "pagar" is a verb with stem -changing in the preterite? Wait, no, the preterite of "pagar" for "yo" is "pagué"? Wait, no, actually, "pagar" is a regular -ar verb? Wait, no, "pagar" has a stem change in the preterite? Wait, no, let's recall: the preterite of "pagar" (to pay) for "yo" is "pagué" (because the stem "pag-" changes to "pagu-" in the preterite for "yo" and "tú" maybe? Wait, no, maybe I made a mistake. Wait, the options are A. pagar (infinitive), B. pagaste (tú preterite), C. pagó (él/ella/usted preterite), D. pagué (yo preterite). The subject is "yo" (Luis is talking about his own action: "Fui..." is "yo fui"), so the verb "pagar" should be in the first -person preterite. So "pagué" is the first -person singular preterite of "pagar". Let's check the options: A is infinitive, wrong context. B is "tú" preterite, wrong subject. C is "él/ella/usted" preterite, wrong subject. D is "yo" preterite, correct. Wait, but wait, maybe I confused the verb. Wait, "pagar" preterite: yo pagué, tú pagaste, él/ella/usted pagó, nosotros pagamos, vosotros pagasteis, ellos/ellas/ustedes pagaron. Yes, so "pagué" is the correct form for "yo" (Luis, the speaker) in the preterite. So the correct option is D.

Answer:

D. pagué