The correct form of the verb "leer" to fill in the blank in the sentence "Él ___ un cuento ayer" is:
A. leyó
Explanation:
1. "Leyó" is the correct form of the verb "leer" in the preterite tense for the subject "Él" (He) in the sentence.
2. The preterite tense is used to indicate actions that were completed in the past.
3. Therefore, the sentence should be: "Él leyó un cuento ayer," which translates to "He read a story yesterday."