Question

QUESTION #2. Which sentence is written correctly? A. Jennifer can hold her breath longer than I can. B. Her writing is the most funniest of the young authors. C. The storm looks more violenter over the lake. D. A lawnmower is one of the most usefulest machines.

Answer 1

a is right.
the rest are wrong because...

b- you dont need to add the 'most' if you already said funniest
c- violenter is not a word. you coulld say more violent
d- you dont need to add the 'most' if you already said usefulest