IMO, C is correct.
A)
Each invoice and gate pass must have "PAID" stamped over
their number
Wrong. Each invoice and gate pass --> singular
B)
Every one of the invoices and gate passes must have "PAID" stamped over
their number
Wrong. Every --> singular
C)
Each invoice and gate pass must have "PAID" stamped over
its number
Correct. D)
All invoices and gate passes must have "PAID" stamped over
its number
Wrong. All --> plural.
E)
Every invoice and each gate pass must have "PAID" stamped over
their number.
Wrong. Every --> singular
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Please +1 KUDO if my post helps. Thank you.
"Designing cars consumes you; it has a hold on your spirit which is incredibly powerful. It's not something you can do part time, you have do it with all your heart and soul or you're going to get it wrong."
Chris Bangle - Former BMW Chief of Design.