Explanation
The correct answer is C, the Cx agent for the project must conduct or oversee the Cx of the PV system.
According to the LEED v4 Reference Guide for Building Design and Construction, the Energy and Atmosphere Prerequisite, Fundamental Commissioning and Verification, requires that all energy-related systems, including renewable energy systems such as PV, be commissioned by an independent commissioning agent (CxA) or a qualified member of the project team who reports to the owner.The CxA or the qualified team member must perform or oversee all commissioning activities, including developing a commissioning plan, reviewing design documents and submittals, verifying installation and performance, and preparing a commissioning report12References:1: LEED v4 Reference Guide for Building Design and Construction, Energy and Atmosphere Prerequisite: Fundamental Commissioning and Verification, page 562.2: LEED v4 Reference Guide for Building Design and Construction, Glossary, page 1020.