Final answer:
The simple subject in the sentence is 'Alicia,' as she is the one performing the action of continuing to work hard at school.
Step-by-step explanation:
The simple subject in the sentence "Even though she was tired, Alicia continued to work hard at school" is Alicia. The simple subject of a sentence is typically the main noun or pronoun that is doing the action or being discussed. In this case, 'Alicia' is the person who is continuing to work hard at school despite being tired, making it the simple subject of the sentence. Therefore, the correct answer is a) Alicia.
The simple subject is the main noun or pronoun that the sentence is about, and it performs the action or is being described in the sentence. In this case, Alicia is the person who continued to work hard at school, despite being tired.