Answer: Life is so hard because nobody is perfect.
Explanation: If everybody were perfect, then life wouldn’t be so hard because people would know how to handle it, and people wouldn’t make mistakes, so life’s mistakes would never happen.
Something about a drug transplant
Answer:
A. They destroy antigens because they are a foreign object.
Answer:
b and idk how to explain it sorry i just know the answer my aunt is a doctor
Explanation: