Sam wants to set custom document properties, so he should open the Custom Document Properties. The correct option is A.
What are custom document properties?
Custom properties define for an Office document.
One can assign a text, time or numeric value to custom properties. One can also assign them the values yes or no. One can choose from a list of suggested names or define your own.
So, Sam wants to set custom document properties, so he should open the Custom Document Properties.
Thus, the correct option is A.
Learn more about custom document properties.
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