Answer:
That's a phrase. Phrases don't have a subject-verb component ........ unlike clauses, which DO have both.
Explanation:
phrase:
My younger brother (no verb)
sat on the floor (no subject)
clause:
My younger brother sat on the floor.
D. "his sister, who had taken a sales job, learned shorthand and French in the evenings so that she might be able to get a better position later on"
Which chapter? I cant answer if I dont know the chapter.