Bird builds nest in jeans

A college student surnamed Shi recently hung up his laundry on the balcony in his school in Wuhan. To his astonishment, when he took in the clothes after two days he found a nest and an egg in a pair of his pants. There have been an increasing number of birds in the school due to the increased number of trees on campus, said the report.

What did the student find in his pants?

A. A bird and an egg

B. A bird and a nest

C. A nest and an egg

（中国日报网英语点津 Helen 编辑）