Select the most appropriate option to fill in the blank.

______ of these boys is doing anything worthwhile.

None

The best option to fill in the blank is None.

The sentence is about the boys not doing anything worthwhile. The word "none" means not one or not any. It is the most appropriate word to use in this context because it conveys the meaning of the boys not doing anything worthwhile at all.

The other options are incorrect.

• Either means one or the other. This is not appropriate in this context because it implies that one of the boys is doing something worthwhile.
• Each means every one of two or more. This is not appropriate in this context because it implies that each of the boys is doing something worthwhile.
• Both means two things. This is not appropriate in this context because it implies that both of the boys are doing something worthwhile.