I would say C. at ten o'clock; modifies came. Adverb phrase always involves when, where, or how. In this sentence, you could ask when did the truck came? Then you adverb phrase would it came at ten o'clock.
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Answer:
If we are talking about current times, I would say from the virus.
Explanation:
When you graduate, there is a graduation ceremony. During that ceremony, everyone is pretty close together, giving a better chance for caching the virus. Hope this helps!
"the process of receiving or giving systematic instruction, especially at a school or university:"
Answer:
Because they needed more land and invaders
Explanation: