Which of the following is CORRECT?

A. She sings bad.
B. He runs a well race.
C. They won with a lucky shot.
D. All of the above.

bad is an adjective, badly is the adverb form... so that one isn't right.

Well mean to be healthy when it modifys a noun.

Sooooo, which one of the other two is correct?

To determine which option is correct, we need to analyze each sentence individually:

A. "She sings bad." - This sentence is incorrect. The word "bad" is an adjective, and in this case, it should be replaced with the adverb "badly" to modify the verb "sings" properly. The correct version should be "She sings badly."

B. "He runs a well race." - This sentence is also incorrect. The word "well" is an adverb, which is used to describe verbs. However, in this context, it should be used as an adjective to describe the noun "race." Therefore, the correct version should be "He runs a good race."

C. "They won with a lucky shot." - This sentence is correct. It uses the appropriate adverb "lucky" to describe the noun "shot." Therefore, C is the correct option.

D. "All of the above." - This option is incorrect because not all of the given sentences are correct. Only option C is correct.

Therefore, the correct answer is option C: "They won with a lucky shot."