The credit for nonbusiness energy property was extended through 2023. Which of the following items is correct regarding this credit?

• A.The credit is subject to a lifetime cap of $2,000.

• B.Credits of fixed dollar amounts are available for energy-efficient property, such as a furnace or water heater.

• C.A 15% credit is available for amounts incurred by the taxpayer for improvements to windows and doors.

• D.Nonbusiness energy property credits are only available through 2021.