请选择ABC;e5Q4F8M7T(F8M-V3?-Hello,Bill? 一No, .:q9^'x6w5o)a'v.]4F0?8u*U1{+^
A. this is Sam:q9^'x6w5o)a'v.]4F0?8u*U1{+^
B. I am Sam:q9^'x6w5o)a'v.]4F0?8u*U1{+^
C. I'm Sam:q9^'x6w5o)a'v.]4F0?8u*U1{+^