[单选题]
A p-type semiconducto;d:7rgo-vn97yd l+rtjf x a(z r i;ik6:--ewo 1whgwv m)vgjb , is produced by
A. doping the host crystal with donor impurities.
B. doping the host crystal with accepter impurities.
C. pure crystals of germanium.
D. none of the given answers