Read the following text and choose the correct answer.

A fox saw a crow carrying a piece of cheese to a treetop. He decided to get the cheese for himself. He went to the tree and started praising the crow that he could sing better than a cuckoo. Hearing this, the crow beamed with pride, and tried to sing. The piece of cheese fell to the ground as the crow opened its mouth to sing. The fox picked up the piece and ran away.

Source: momjunction.com

What did the crow carry to a treetop?