A gaseous reaction has the rate law rate $=k[\mathrm{A}][\mathrm{B}{]}^2$. The volume of the reaction vessel is reduced to one-third of its original value at constant temperature, with no change in the amounts of gases. The rate becomes

1. A9 times the original
2. B3 times the original
3. C27 times the original
4. D81 times the original