【单选题】Which of the following is true regarding productivity and productivity measurement?
A.
Although productivity and quality are sometimes related, they are generally separate and independent concepts.
B.
The general form for measuring productivity is "resource inputs" divided by "outputs".
C.
Companies are required to report labor productivity so that the government can calculate national productivity.
D.
Labor-productivity measurement is popular because most countries keep accurate records on employment and hours worked thus making labor productivity easy to calculate and compare.