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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Alliterations are the occurrence of the same letter or sound at the beginning of adjacent or closely connected words. In hatchet Gary Paulson writes “food fish” on page 45, or at the beginning of chapter 13. This is an example of an alliteration.
Answer:
For example, round signs warned of approaching railroad crossings
which even then represented the most potential danger to the driver
(paragraph 5)
Explanation: