You can't imagine the difficulty he ____into the cold river and saving the drowning girl.A.had to jump B.had jumped C.had jumping D.had on jumpinghe ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为

You can't imagine the difficulty he ____into the cold river and saving the drowning girl.A.had to jump B.had jumped C.had jumping D.had on jumpinghe ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为
You can't imagine the difficulty he ____into the cold river and saving the drowning girl.
A.had to jump B.had jumped C.had jumping D.had on jumping
he ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为have difficulty （in）doing sth 的词组选C?

You can't imagine the difficulty he ____into the cold river and saving the drowning girl.A.had to jump B.had jumped C.had jumping D.had on jumpinghe ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为
在这里difficulty后面的这个句子是一个定语从句,the difficulty是先行词,即被修饰词.省略了关系代词that/which,先行词difficulty在定语从句是充当had的宾语.
You can't imagine the difficulty.
He had difficulty jumping into the cold river and .
这样一来就知道为什么填C了.

我觉得应该是根据并列而不是那个have difficulty (in) doing