In the excerpt below, the word rebuff means ___ .

“In this way, goaded on by the id, hemmed in by the superego, and rebuffed by reality, the ego struggles to cope with its economic task of reducing the forces and influences which work in it …” ( Paragraph 4) 

A、to laugh at
B、to quarrel with
C、to look down upon
D、to reject bluntly, often disdainfully