A cuboidal room 8 feet wide, 12 feet long and 14 feet high has an attic at a height of 7 feet along its length. If the attic is 4 feet wide, what is the length of the longest ladder that can be put from one of its corner to the attic?

(A)sqrt(404)

(B) sqrt(209)

(C) sqrt(272)

(D) 13

(E) 17.89

Thanks in advance