Umbrella policy can drop down to provide coverage not insured under primary policies.

• A. It always replaces primary liability coverages.
• B. It cannot be used with other primary policies.
• C. It may drop down to provide coverage not insured under primary policies.
• D. It provides no extra coverage beyond primary policies.

Answer: (C)

The main idea here is drop-down coverage. An umbrella policy sits above your primary liability coverages and provides extra limits. In some cases, it can also step in to cover gaps or exposures that aren’t insured by the underlying policies—this is called drop-down coverage. So, it can drop down to provide coverage for claims that the primary policies don’t insure, up to the umbrella limit and subject to the policy’s terms.

This is why the statement is the best description. The umbrella doesn’t replace primary coverages; it requires them in place, and it adds coverage beyond what the primary policies provide.