How Extensive Are the Effects of Human Activities on the Planet

How extensive are the effects of human activities on the planet?

A) Humans have indirectly affected about 75% of the earth's land surface.
B) Humans have caused great harm in the world's oceans, but not so much on land surfaces.
C) Humans have directly affected about 75% of the earth's land surface.
D) Humans have directly affected about 83% of the earth's land surface, including Greenland and Antarctica.
E) Humans have directly affected about 83% of the earth's land surface, excluding Greenland and Antarctica