A. The ensign should be hoisted when the sun rises.
B. The ensign should be lowered when the sun rises.
C. The ensign should be hoisted when the sun sets.
D. The ensign should be lowered when the sun sets.

A. Adjust the mooring lines on time.
B. Adjust the mooring lines in time.
C. Adjust the mooring lines quickly.
D. Adjust the mooring lines slowly.