Step 1: Analyze subject-verb agreement.
"Milk and vegetables" is a compound subject, which is plural. Therefore, the verb should be "are" to match the plural subject. Step 2: Analyze each option.
- (A) is: Incorrect. "Is" is singular and doesn’t match the plural subject "milk and vegetables."
- (B) has: Incorrect. "Has" is a singular verb, and it is not appropriate here.
- (C) are: Correct. "Are" is the correct verb for a plural subject.
- (D) have: Incorrect. "Have" is a verb used for possession, and doesn't fit here. Step 3: Conclusion.
The correct sentence is "Milk and vegetables are good for health."