The Temperature of a Room at 21 ^$\circ$ C Is Raised Such That the Average Speed of the Raised

The temperature of a room at 21 ^$\circ$ C is raised such that the average speed of the molecules increases by 10%.What is the new temperature of the room?

A) 51 ^$\circ$ C
B) 25 ^$\circ$ C
C) 63 ^$\circ$ C
D) 83 ^$\circ$ C
E) 42 ^$\circ$ C