Question

narrowleaf evergreens propagated by hardwood cuttings are often very difficult and slow to root; pines are ______ to root.
a. easier than most
b. fairly easy
c. uncommonly easy
d. extremely difficult

Explanation:

The question is about plant propagation (narrowleaf evergreens, specifically pines) and their rooting difficulty. The first part says narrowleaf evergreens from hardwood cuttings are hard/slow to root. Pines, being a type of narrowleaf evergreen, should follow the same trend or be consistent. Option d ("extremely difficult") aligns with the context that they are hard to root. Options a - c suggest ease, which contradicts the "difficult and slow" setup.

Answer:

d. extremely difficult