Final answer:
The appropriate verb to fill in the blank is 'está' (option A).
Step-by-step explanation:
In this sentence, the subject 'Ignacio' is singular, so we need to use the appropriate verb form. The correct verb to fill in the blank is 'está' (option A). The verb 'está' is the third person singular form of the verb 'estar', which means 'to be' in English. Therefore, the sentence should be: 'Ignacio está enojado conmigo.'
Learn more about Spanish verbs