Step 1: Understanding the structure of the sentence.
In the sentence, the phrase "require that" is followed by a noun clause, which is commonly constructed using the base form of the verb (without any additional auxiliary verbs). Therefore, the correct answer should have the verb in its base form, which is "undergoes."
Step 2: Analysis of options.
- (A) that the chocolate undergoes: Correct. The verb "undergoes" is in its correct form following "require that."
- (B) that the chocolate undergo: Incorrect. The verb "undergo" is in the base form, which is grammatically incorrect in this context.
- (C) that the chocolate is to undergo: Incorrect. The construction "is to undergo" introduces unnecessary complexity.
- (D) the chocolate undergoing: Incorrect. "Undergoing" is a present participle and does not fit the sentence structure here.
- (E) the chocolate to have to undergo: Incorrect. This construction is awkward and does not follow standard usage after "require that."
Step 3: Conclusion.
The correct answer is (A) that the chocolate undergoes, as it follows the standard grammar rule for "require that" clauses.