Which sentence correctly uses a semicolon?
A. The cats appeared lazy this afternoon; both of them were
snoozing in the sun.
B. I'm not sure which is worse; the effort needed to sweep the
driveway, or the time.
C. In the evening, he made a declaration; the schedule for the rest of
the week.
D. If Sam had been paying attention; he would have realized he had
the information.