Answer: B) If we had another backpack, we were going to carry more food.
Explanation: The mood of a verb is the manner or attitude in which the action is expressed. Verbs can express facts, wishes, possibilities, or commands. A verb in the indicative mood expresses fact, opinion, assertion, etc. The imperative mood expresses a command, and the subjunctive mood expresses a wish or possibility. From the given options, the one that shows the correct verb mood usage is the corresponding to option B, because it is expressing a possibility (or a hypotetical situation, expressed by the word "if") and it uses the subjunctive mood.
