One Result of the Single European Act Was That It

One result of the Single European Act was that it

A) proposed to place frontier controls among European Community countries.
B) sought to abolish the application of the principle of "mutual recognition" to product standards.
C) proposed to reduce costs indirectly by preventing national suppliers to compete.
D) provided the impetus for the restructuring of substantial sections of European industry.
E) proposed to reduce costs directly by preventing lower-cost suppliers into national economies.