The Major Elements of the Kyoto Protocol Were 1) an Aggregate

The major elements of the Kyoto Protocol were 1) an aggregate emissions- reductions target of 5 percent below the 1990 level of emissions by 2012;
2) clear policy guidelines for emissions reductions for each signatory country;
3) acceptance of a system of internationally tradable pollution permits.

A) 1 and 3
B) 3 only
C) 2 only
D) 1 only
E) 1 and 2