【单选题】1What are the writing principles that we should observe when we write a business letter?
A.
Clarity, Completeness, Conciseness, Correctness, Concreteness and “You” attitude.
B.
Consideration, Courtesy, Completeness, Concreteness, Clarity and “We” attitude.
C.
Completeness, Conciseness, Vagueness, Concreteness and Consideration.
D.
Consideration, Courtesy, Completeness, Concreteness, Clarity, Conciseness and Correctness.