Wrong answer, try again!

Wrong answer, try again!

Correct answer!

Comment:

Ideas expressed with positive forms are clearer and more memorable. Thus, 'should have no' is clearer than 'should not have any'.

Avoid contractions in formal business writing (e.g. 'isn't' or 'won't', as opposed to 'is not'; 'will not'). Contractions give your writing a conversational tone, so only use them in informal writing.

Grammar: 'an' and 'any' are both correct here. 'Any' adds emphasis.