Final answer:
In this sentence, the subject is 'yo' and the correct verb forms are 'toqué' and 'tocaste'.
Step-by-step explanation:
Anoche yo
toqué la guitarra y tú
tocaste la trompeta. In the sentence, 'yo' is the subject and it corresponds to the first-person singular pronoun 'I'. The verb 'toqué' is the first-person singular past tense of the verb 'tocar', which means 'to play'. 'Tú' is the second-person singular pronoun 'you', and 'tocaste' is the second-person singular past tense of 'tocar'. So, the correct answer is option OC. toqué, tocaste.
Learn more about Verb conjugation in Spanish