[单选题]
A sample of an ideal gas/dvol cjp7+/i ud* gh; is heated anx x,.uad6bgz/y 9u2t2okcgbd1 rgi 60d its Kelvin temperature doubles. What happens 26.bx,b2tgdu019ya cdk/ ig6xzr guoto the average speed of the molecules in the sample?
A. It does not change.
B. It doubles.
C. It halves.
D. none of the above
