[单选题]
A sample of an ideal gas is heated and its K5g scc8x7k9kjmq ),id elvin teo2u.d 7rfu(xalyf./gf1u h7 n: oje3imperature doubles. What happens to t udu.h77(eyx a3lu.fo 2if/grnof j1:he average speed of the molecules in the sample?
A. It does not change.
B. It doubles.
C. It halves.
D. none of the above
