The red-cockaded woodpecker is an endangered species living in the southeastern U. S. Two of the primary factors that have contributed to the species' decline in numbers are: 1) Old pine trees required for nesting sites have been clearcut and logged by humans.

2) Humans have suppressed wildfires, which normally clear out other kinds of trees (hardwoods) from the understory. These hardwoods disrupt the woodpeckers' habitat and prevent new pines from growing.

Which of the following would be an important part of a multi-step plan to restore the stability of the red-cockaded woodpecker's ecosystem?
A.
Install irrigation systems to help prevent fires in the understory.
B.
Limit further logging and clearcutting of pine trees.
C.
Encourage planting of understory hardwoods.
D.
Prevent logging of pine trees, but encourage pine clearcutting.