There are 50 students in Class1, they went to different places on Children's Day (each student only went to one place). According to the chart, ________ students went to Qionghai Wetland Park.

Lushan Mountain	Luoji Mountain	Qionghai Wetland Park	The Moon Lake Park
30%	40%	?	10%

A、fifteen

B、twenty

C、five

D、ten