请选择DCBA'^)_5C/],?4m3n8m*D:@'}+X7H6?9h-} They write most of their.___ in English.*o*Q*~*_*|
A. business letter*o*Q*~*_*|
B. business letters*o*Q*~*_*|
C. businesses*o*Q*~*_*|
D. businesses letters*o*Q*~*_*|