What is an example of a good whose price goes down because of improvements in technology?

The benchmark default-free interest rate of the financial system is generally considered to be:

A) the federal funds rate B) the interest rate on the 10-year Treasury note C) the discount rate D) the 30-year fixed rate mortgage

When supply is perfectly elastic, the value of the price elasticity of supply is

a. 0. b. 1. c. greater than 0 and less than 1. d. infinity.