During the execution of contract, you found one subcontractor of your seller was working as per a wrong specification. To pledge the schedule of your project, you write to this subcontractor directly to advise the correct specification. Your action is _____.
A、Correct, because you must catch the schedule
B、Incorrect, because the subcontractor will not follow your advices
C、Correct, because your seller is not active
D、Incorrect, as per privity of contract, this will release the responsibility of seller to fulfill contract