A school safety agent must write a memo about a policy change. Which opening sentence is most appropriate?
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A
The purpose of this memo is to inform all staff of the updated visitor sign-in procedure effective Monday.
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B
Hey everyone, just wanted to let you know we are changing how visitors sign in.
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C
So basically visitors need to start signing in differently from now on.
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D
This memo is being written because the principal said we have to change things.