Reserves expected to be recovered through future investments.

• A. Developed Reserves
• B. Undeveloped Reserves
• C. Contingent Resources
• D. Prospective Resources

Answer: (B)

Reserves that are expected to be recovered with additional investment are undeveloped reserves. This means the oil or gas is known to exist and is economically viable to produce, but you still need to drill additional wells or build new facilities and commit capital before they can be recovered. Developed reserves, by contrast, can be produced with existing equipment and facilities. Contingent resources depend on meeting certain conditions and are not yet classified as reserves, while prospective resources refer to undiscovered accumulations with even more uncertainty.