Which “while” of the following shares similar (相似的) usage to the one in the sentence “Many birds live in Zhalong all year round, while some go there only for a short stay.”?

A．Tom is very confident while Katy’s shy and quiet.

B．We chatted with each other in the park for quite a while.

C．Can you help me look after my pet dog while I’m away?

D．While I was waiting for the bus, a stranger came towards me.