请选择ABC0j;U/g3B:Z*V9U0}-t2m1a7f*aHello!Is that Liu Tao? Yes, ________ Liu Tao speaking.,b1u1M'u/X0q*O'~
A.I am,b1u1M'u/X0q*O'~
B. That is,b1u1M'u/X0q*O'~
C. This is,b1u1M'u/X0q*O'~