In Spanish, the present perfect is formed with the conjugated form of the auxiliary verb “haber” plus the past participle of the main verb. Sentence “A” uses this tense correctly because the verb “haber” is correctly conjugated in accordance with the subject “Tú,” which is in second person singular, and is followed by the past participle of the ver “buscar,” which is “buscado.” This tense is used to talk about actions that started in the past and continue in the present or that are related to the present and about actions that happened recently.
