The sentences that use an adverbial clause are:
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So that we would have enough left for tomorrow, we only used half of the vegetables in the salad. (The adverbial clause is "so that we would have enough left for tomorrow," which indicates purpose.)
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Javy was named captain of the team despite it being his first year on the team. (The phrase "despite it being his first year on the team" acts similarly, although it's more accurately described as a subordinate clause; however, in some contexts, it can also function like an adverbial clause by providing context to the action about Javy being named captain based on the circumstance of his experience.)
From the options provided, the first sentence is clearly an adverbial clause, while the second is more nuanced. The best answer is countable as one clear adverbial clause with an additional possible interpretation for the second. However, it seems the first one is the direct representation of an adverbial clause.
Thus, the clear selections focusing on the format of adverbial clauses are:
- So that we would have enough left for tomorrow, we only used half of the vegetables in the salad.
(For clarity, if only one adverbial clause was required, it would be the first option.)