The most recognizable differences between American English and British English are in（）and vocabulary.

A.a polysemous
B.a synonymous
C.an abnormal
D.a multiple

A.They cannot pronounce/n/
B.Interlangue interference because there is notthe sound /n/in their mother tongue
C.The teachers do not have a good teaching method
D.They do not like to pronounce nasal sounds