请选择CBA,j6R0x5v - _____ bikes are there under the tree? -There are four.2O.@0u/h8`*O2p;I
A. How many2O.@0u/h8`*O2p;I
B. How much2O.@0u/h8`*O2p;I
C. What2O.@0u/h8`*O2p;I