What does the affectivity date for a product's price list entry control?

Evaluation entity filters are used as "internalfilters" for qualification entity filters.

Carole White currently has Internet service at her primary residence but she will be relocating to a new address. What action can be taken to best assist her in the relocation process?
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Which of these enables you to assign two base prices to a product?
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What can you set using the cardinality of a promotion's child product? (Choose THREE) Note: This question displayed answer options in random order when taking this Test.