A building owner is considering the installation of a solar thermal panel on the roof of the building. The initial cost of the system is higher than a conventional natural gas system. Which of the following is true to make the renewable energy option economically feasible? Calculator Utility cost savings over the lifetime of the system must offset the higher initial cost B Higher initial cost must exceed the cost of the utility over the lifetime of the system C Higher initial cost must exceed the savings on the utility cost over the lifetime of the system D Utility cost savings over the lifetime of the system must be lower than the higher initial cost of the system