It is global warming, not other things ________ the extreme weather.

A. that have led to         B. which has caused 

C. which are causing     D. that has led to

It is global warming, not other things ________ the extreme weather.

A. that have led to       B. which has caused 

C. which are causing    D. that has led to

It is global warming, not other things, ______ the extreme weather.

1. A.
   that have led to
2. B.
   which has caused
3. C.
   which are causing
4. D.
   that has led to

It is global warming, not other things, ______ the extreme weather.

It is global warming, not other things, ______ the extreme weather.