Martin Has a Small Wound on His Leg That He

Martin has a small wound on his leg that he got while camping. Martin notices that it is taking a long time to heal and wonders why this is. You know that Martin has recently split from his longtime partner and just got laid off from his job. You tell him that it is possible that:

A) he did not use the correct medicine on the wound and this is why it is not healing.
B) he is feeling stressed, and it is taking longer to heal than it would if he were not feeling stressed.
C) he needs to just be patient with the healing.
D) it is all in his head, and he is healing just fine.