This bird was very brightly colored and strong . He flew about the room , whistling , singing all the while . The white bird seemed spiritless and withdrawn as the colorful , yellow bird flitted about , singing , landing atop the cage , then flying up a bit above it to perch .

Question: What 's a possible reason the bird flew about the room ?
Answer: Because it was singing all the while .None of the above choices .Because it was whistling .Because it was very brightly colored .