Please choose the correct ending to complete the given sentence: Building sandcastles: Two girls are sitting in sand on a beach. the girls

Ending1: both salute their pom poms in the air. Ending2: then begin to flip, turn, and run. Ending3: pull the rope of a boat while another girl in a bikini swims behind. Ending4: begin building a sand castle.

Answer format: ending1/ending2/ending3/ending4