it is snowing heavily but the postman is still( )the village to deliver the letters

it is snowing heavily but the postman is still( )the village to deliver the letters
A.standing in his way to
B.walking on his way to
C.making his way to
D.going by the way to
选什么?
说一下四个选项的含义,用法!
但是其他几个选项错哪?