Final answer:
The sentence "Carolina está comiéndola" is grammatically correct. Carolina is eating it (the apple).
Step-by-step explanation:
The sentence "Carolina está comiéndola" is grammatically correct. In this sentence, Carolina is the subject and está comiéndola is the verb phrase. The verb comer means to eat and the pronoun la represents the object being eaten, which in this case is an apple. Therefore, the sentence translates to "Carolina is eating it (the apple)."
Learn more about Spanish Grammar