clearly imply about Yolanda's feelings?

"Please," she urged the bills on him. But he too looked down on the ground with the bashfulness she had observed in Jose of country people not wanting to offend. She felt the poverty of her response and stuffed the bills quickly into his pocket.
• a
Yolanda feels uncomfortable because she should be looking at the ground as the men are doing.
O b
Yolanda feels humiliated because she does not have enough money to give to the men for the work they did,
O c
Yolanda feels ashamed because she does not know what to say to persuade the men to take the money.
O d
Yolanda feels embarrassed because she should have given the money to Jose to give to these men.

b. Yolanda feels humiliated because she does not have enough money to give to the men for the work they did.