Which clause prevents claiming for all items within a collection when some are lost or damaged?

The correct answer is the Pair and Set clause. This clause is specifically designed to address the situation where an item is part of a collection or a set. When one or more items from a pair or set are lost or damaged, the Pair and Set clause limits the insurer's liability to just the portion of the collection that was lost or damaged, rather than covering the entire pair or set.

For example, if you have a set of matching china and one piece is broken, under this clause, the insurance would compensate for the value of the broken piece, but not for the entire set. This prevents claims for all items in a collection based on partial loss, encouraging a more accurate assessment of the actual damage.

In contrast, other options serve different purposes: a Valued basis typically means that the insurance policy will pay a pre-agreed amount for a total loss, a Coverage limit refers to the maximum amount an insurer will pay for any claim, and a Replacement clause deals with replacing lost or damaged items with new ones rather than just compensating for their value. Each of these options addresses different aspects of insurance coverage but does not specifically pertain to the nuances of collections and sets in the same way as the Pair and Set clause.