Respuesta :
Answer:
D. A subject is needed to complete the independent clause.
Explanation:
All sentences must consist of at least one independent clause and may contain one or more subordinate clauses. The defining feature of clauses is that they are groups of related words with at least one subject and one verb. In the sentence the subordinate clause “Because Juan hadn't been feeling well” is complete because it has both a subject and a verb; however, the subsequent clause “called in sick to his job.”, which it's the independent clause, is not complete because it lacks the subject, the doer of the verb “to call in sick;” it is missing the pronoun of the noun “Juan”: he.