What portion of the Earth’s surface is too hot, cold, or wet to grow crops?

non-ecumene places

Explanation:

The non-ecumene places are the uninhabited portions of the earth. These places are subjected to have too extreme temperature conditions were no life can sustain. These places are excluded from the maps of the countries. For example, Antilope island, Much of Australia, Baker island, Big Major Cay and others.

d is the logical answer but im not a 100% sure