In the sentence "(I propose) que cocinemos pasta para la fiesta," the correct form of the verb to use is "propongo," which corresponds to "I propose" in English.
Explanation:
1. The pronoun "I" in the sentence refers to the first person singular.
2. The verb "propongo" matches with the pronoun "I" and signifies "I propose."
3. The verb "propongo" agrees in person and number with the subject "I" in the sentence.
4. Therefore, the correct answer is B. Propongo.
