The correct answer is A. The insured's EBI policy will pay the loss in full. Equipment breakdown insurance, often called EBI, is designed to cover losses caused by sudden and accidental breakdown of covered equipment, including pressure vessels, boilers, mechanical systems, electrical systems, and related apparatus. In this scenario, the loss begins with a pressure vessel rupturing due to a faulty safety valve. That is an equipment breakdown event. The resulting escape of water and physical damage to the factory are consequences of the equipment breakdown. Therefore, the EBI policy is the appropriate responding policy, subject to its terms, limits, and exclusions. A commercial general liability policy would not pay the insured's own first-party property damage in full; CGL is designed primarily for third-party bodily injury or property damage claims. A remediation policy is normally associated with environmental cleanup or pollution, not a pressure vessel rupture. The insured does not simply choose whichever policy they prefer. Coverage depends on the cause of loss and policy wording. The proximate cause here is equipment breakdown. Course topic reference: Property Coverages; Equipment Breakdown Insurance; Pressure Vessels; Consequential Property Damage; First-Party Loss.

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