A．his masters feared he might be exposed by a security ……
Hanssen apparently was mothballed by the Kremlin after the collapse of the Soviet Union in 1991 in part because ______.
A．his masters feared he might be exposed by a security breach in the United States B．they were getting information of more immediate value from their mole in the CIA, Aldrich Ames through various means C．they can at least use Aldrich Ames, whose information is of more immediate value D．both A and B
