Identify the kind of noun in bold. 

The apples have ripened.

Option B is the correct option. "Apples" are common nouns. The name of all things, places, animals, and things is known as a common noun. A noun is the name of any animal, place, person, or thing. A common noun is a generic name like apple, orange, girl, buildings etc. A common noun is not capitalised no matter where it is placed in a sentence. A common noun is the generalised version of a proper noun.