单选题Which of the following is false?（）AA company should develop a SMS and implement itBA company implementing a SMS properly may obtain a DOCCOnce a company obtains its DOC, each vessel of this company will obtain a SMCDDOC is valid for 60 months unless “major non-conformity” is found
单选题
Which of the following is false?（）
A
A company should develop a SMS and implement it
B
A company implementing a SMS properly may obtain a DOC
C
Once a company obtains its DOC, each vessel of this company will obtain a SMC
D
DOC is valid for 60 months unless “major non-conformity” is found
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