She was happy,（）

A.So are you

B.So you are

C.So you were

D.So were you

当两张表进行无条件连接时，交叉组合后形成的新记录个数是

A．两张表记录数之差

B．两张表记录数之和

C．两张表中记录多者的记录数

D．两张表记录数的乘积