T<para>TThe Economic Downturn of the 1970s Had Deep Roots in the Failure

T<para>TThe economic downturn of the 1970s had deep roots in the failure of the United States to __________.

A) reach meaningful agreements with the Soviet Union on arms control
B) make basic reforms in its tax code
C) locate and open new markets in Asia and Africa
D) keep up with the rising industrial efficiency of its competitors