One indication that the carrying capacity of the earth is at or above its maximum is:

a. The world’s population increases by about 1.6 million people per week

b. Man has a tremendous ability to change his environment

c. All the energy for change on earth come from the sun

d. Today, 50% of the earth’s people are hungry or malnourished

e. The destruction of aquatic environments by phosphate detergents is increased