Use the sentence to answer the question.

The man's incredible generosity in gifting ten thousand dollars toward the scholarship drive was unexpected but welcomed.
The root of the word is cred, which means "to believe." The prefix of the word is in, which means "not." Based on its root and prefix, which might incredible mean in this sentence?

1. Believable
2. Showing approval
3. Impossible to believe
4. Kindhearted

3. Impossible to believe

Based on its root and prefix, in this sentence, "incredible" might mean 3. Impossible to believe.

Based on its root and prefix, "incredible" might mean "impossible to believe" in this sentence.

To get the answer, we can break down the word "incredible" and analyze its parts. The root of the word is "cred," which means "to believe." The prefix of the word is "in," which means "not" or "opposite." When combined, "incredible" means "not believable" or "impossible to believe." In the context of the sentence, the man's incredible generosity suggests that his act of gifting ten thousand dollars was extraordinary and unexpected. Therefore, "impossible to believe" is the most suitable meaning for "incredible" in this sentence.