I think it’s “All day we unpacked boxes, filled cupboards” because the first one doesn’t have anything to do with determination, the second one doesn’t fit determination either, and the last one doesn’t fit either. The third one fits because doing something ALL day would be determination I’m pretty sure.
The correct answer is option d: merchants
In grammar rules, an antecedent can be identified in a sentence because it is later replaced by a pronoun. An antecedent also refers in a sentence to something that happened in the past.
In the sentence provided as an example, the Venetian 'merchants' is the noun that is later replaced by its respective pronoun (theirs). The verb brought also tells us it was something that happened in the past.
The correct answer is the second one.
