Answer:
D. It blocks the entry of pathogens through the wound.
Explanation:
Basically, it protects the cut surface of the limb of the tree.
These are the answer choices.
A) minimize water loss by evaporation from the cut surface.
B) improve the appearance of the cut surface.
C) stimulate growth of the cork cambium to ʺhealʺ the wound.
D) block entry of pathogens through the wound.
E) induce the production of phytoalexins.
The answer would be D.
Hope this helps!
If not, I am sorry.