Answer: He is considerate and thoughtful toward others.
Step-by-step explanation:
The options include:
a. He wants to hide and then surprise his sister.
b. He is considerate and thoughtful toward others.
c. He has only one human possession, the bedsheet.
d. He can’t bear to look at his sister anymore.
The act suggests that Gregor is considerate and thoughtful towards others. After Gregor turned into the giant insect, he noticed that his sister, couldn't look at him and therefore decided to stay under the bedsheet.
It showed that he thought about others and doesnt want to inconvenient them. He considered his sister and treated her with respect and doesn't want to be a source of discomfort to her.