问题
Which of the following sentences is RIGHT
A:I am convenient to go there by train
B:I go there by train at convenience
C:It is convenient for me to go there by train
D:It is convenience for me to go there by train
B:I go there by train at convenience
C:It is convenient for me to go there by train
D:It is convenience for me to go there by train
正确答案是：
