3 ...The sand was extremely hot, and it burned her feet. Because the girls had not brought their sandals with them to the water, they sprinted back to their towels and winced with each step.

4 Back at their towels, Lola and Emma noticed that Jake and Matt, Lola's brothers, were busy building a sandcastle. The castle had elaborate designs carved on its tops and sides. Lola and Emma were impressed with boys' building skills. Just then, Jake and Matt noticed the tide coming in, and they moaned grimly. The castle would collapse if the water touched it.

Jake and Matt’s problem was influenced by

A) the clouds parting in the sky.
B) the sun shining on the sand.
C) the ocean tides coming in.
D) the sky being dark.