Amy Discovers a Way to Produce Water Heaters So They

Multiple Choice

Amy discovers a way to produce water heaters so they are less expensive and use less natural gas.Amy's discovery is

A) physical capital.If Amy's discovery leads to lower natural gas prices,it has made natural gas less scarce.
B) physical capital.If Amy's discovery leads to lower natural gas prices,it has made natural gas scarcer.
C) technological knowledge.If Amy's discovery leads to lower natural gas prices,it has made natural gas less scarce.
D) technological knowledge.If Amy's discovery leads to lower natural gas prices,it has made natural gas scarcer.