请选择ABCD1h4r2R(d-m6|+`(Z9\,d6})| They write most of their.___ in English.+D2`;g0C(K5[)B:k
A. business letter+D2`;g0C(K5[)B:k
B. business letters+D2`;g0C(K5[)B:k
C. businesses+D2`;g0C(K5[)B:k
D. businesses letters+D2`;g0C(K5[)B:k