Tim visits the zoo with his magic crayon. He sees a panda eating bamboo. “Why are you black and white?” asks Tim. The panda smiles, “I lost my colors!” Tim draws red flowers and a yellow sun with his crayon. Suddenly, the panda turns colorful! They laugh and play. The magic crayon makes happy days! 

1. 4.What makes the panda turn colorful?（推理判断）

A    The magic flower.

B    The magic crayon.

C    The magic panda.

D