Here is a survey（调查） about how the 1，000 students from No．2 Middle School go to school on weekdays．One third of the students going to school by bike are girls．Then according to the form below，_____boys go to school in the same way．（　　）

By bus	By bike	By car	On foot
40%		36%	9%

A．

150

B．

100

C．

50