Because the preterite form of the verbs in Spanish alludes to actions that were carried out in the past. As they are asking me for the form of the conjugated verb in the first person of the singular, the correct way to express it is option C, where the phrase would be "Yo bebí". (I drank).
Hola ayer fuimos a La mesa. Fuimos con todos nos amigos. Yo pedí un taco con limon y chile. Los otros ordenado tamamles. El servicio fue malo. !No deje una buena propina!