In the question below, three statements are given which may or may not contain an error in any part of the sentence. Identify the statements containing an error and also point out the part containing the error.

I) If it (A)/ would rains,(B)/ she will (C)/ not come. (D)
II) The control group (A)/ was given advices (B)/ only on better dietary (C)/ habits for children. (D)
III) Currently, some credentials (A)/ require a specific (B)/ level of coursework, but (C)/ others don't require any. (D)