What contributes to the conflicts between Tristan and Alfred?

A.The fact that Tristan does not save Samuel’s life in the war.

B.The fact that Samuel dies in the war.

C.The fact that Susannah falls in love with Tristan.

D.Samuel’s death as well as Susannah’s falling in love with Tristan.

正确答案：Samuel’s death as well as Susannah’s falling in love with Tristan.