The correct answer is D. Had gone
Step-by-step explanation:
In the English language there are different tenses that express whether an action occurred in the past, is part of the present or will happen in the future, to determine which correct tense is the most appropriate it is required mainly to understand the context of the sentence to identify when the actions take place or in which order they occurred in the case of "Augusto _____ to play soccer just before I called him" the sentence suggest the action of "I called him" occurred after Augusto left, which means the action performed by Augusto also belongs to the past, but considering it occurred before the action expressed in past "I called him" the most correct tense is the past perfect that is mainly used to express actions that took place before some point of the past and that is composed by the auxiliary verb "Had" and the past participle which in this case would be "had gone", therefore "had gone" is the most appropiate option and the grammatically correct one.