I have seen this and I am confused.
"Do you want us to travel by bus"?
"No, I prefer you........by train."
The key is B.
There are two constructions of prefer:
- prefer sb to do sth.
- prefer (that) + clause in the present subjunctive mood tense.
So I think B&C are correct. Is it right, please?
(not a teacher)
If this were first person, you would use C ("I prefer to travel by train."), but as the sentence stands (second person), only B is correct.