Which sentence corrects the vague pronoun in the underlined sentence?
trevor and martina were supposed to visit marcie over the weekend to
work on a project. however, she forgot, and the project wasn't
completed in time. that monday, they were forced to stay after school
to complete it and still got a low grade.
a. however, when she forgot, the project wasn't completed in time.
b. however, he forgot, and the project wasn't completed in time.
c. however, the project wasn't completed in time because she forgot.
d. however, marcie forgot, and the project wasn't completed in time.