Answer:
D. Was you and Kyle planning to work on the school magazine?
Step-by-step explanation:
This is the sentence in which the underlined verb does not agree with its subject. In the sentence, the subject is "you and Kyle." This includes two people and is therefore a plural subject. However, the verb is written in the singular form: was. The plural form of the verb "to be" is "were," which is the word that should be used in this sentence.