Answer:
C) because his fear made him forget all he learned
Step-by-step explanation:
The character sketch of Paul Berlin is feared and nervous from the very start of the story. He always afraid of death, but to make his father proud, he hides those feelings under his laughter. He pretends to be courageous, but deep inside, he was held captive by his fears. When Billy dies in war, he laughs, but underneath it, he was hiding his insecurities. He was not so courageous from the start of the story, but he has to pretend to move into society.
We often confuse gender with sex. Sex is something with which we bear, but we can have qualities of females and males. Because we have to move in society, people hide their identity, their inside feelings. Everyone has different life experiences according to their circumstances and life experiences. We cannot judge someone based on their sex. Everyone is equal and different qualities developed under some particular surroundings. The same happens in the case of Paul. He died of a heart attack just because he would not be able to overcome his fears.