In the following sentence, some parts have errors and some are correct. Find out which part has an error and mark it as your answer. if there is no error mark 'option E'

Everybody is grumpy if would it rains. (A)/ It spoils the mood for the party. (B)/ The weather forecast said that it would be a bright and sunny day. (C)/ They couldn't be more off the point. (D)/ No error (E)