Oliver Is Filling Out an Online Job Application for an Administrative

Oliver is filling out an online job application for an administrative position with a local law firm. He has never written a professional letter before, so he writes it the same way he'd write any e-mail. His first line reads, "Hey, how u doin? Parents say I gotta find a job, & the one on yr site looks kewl."What language rule has Oliver violated?

A) Chomsky's theory
B) pragmatics
C) speech segmentation
D) morphophonemics