In the following sentence, one part has an error and the other parts are correct. Find out which part has an error and mark it as your answer. If there is no error, mark ‘No error’ as your answer.

Life is full of up and downs, the road is never easy (A) but it has to be traversed upon and handled with great care. (B) The world as we know it is a cruel place and it does not make life easy. (C) No Error (D)