Joshua's birthday party begins at the time shown. The party lasts 4 hours.

A clock is showing the hour hand at 1 and the minute hand at 12.

What time is the party over?

A.
six o'clock

B.
five o'clock

C.
four o'clock

D.
three o'clock

D. three o'clock

To determine the end time of the party, we need to add 4 hours to the starting time.

The starting time is indicated by the position of the clock's hour and minute hands. Here, the hour hand is pointing to 1 and the minute hand is pointing to 12.

From this, we can infer that the starting time is 1 o'clock.

Adding 4 hours to 1 o'clock, we get 5 o'clock.

Therefore, the correct answer is option B. five o'clock, as the party is over at that time.