It's D. Similes use like or as. Metaphor calls one thing another. And alliteration uses the same letter/ sound combination.
This depends on your age and what language you are trying to learn really. Think about it this way, when you were born, how long did it take you to learn English (or your native tongue)? About five years right? This also depends on a bunch of other different factors like how much you practice, your determination, and the fluency of the language your speaking. So really there is no real definite answer because all people are different, but if I were to say, I'd say about five years...
Answer:
Clusters of colorful flowers covered the yard like an exotic carpet
Explanation:
Most smilies use "like" or "as" to establish the comparison they are making. In this case, the sentence above uses "like" to compare clusters of colorful flowers and an exotic carpet.
