Three commonly used productivity variables are: quality, external elements, and precise units of measure. labor, capital, and management. technology, raw materials, and labor. education, diet, and social overhead. quality, efficiency, and low cost.

The correct answer is letter "B": labor, capital, and management.

Explanation:

Labor, capital and management are the three variables mostly used to measure productivity. Labor refers to the staff who are responsible for doing all of the physical and mental tasks that keep a company going.

Capital refers to the buildings, machinery, and tools used in the manufacturing process. It also involves talking about intellectual capital, which is the technical expertise that a company acquires over time.

Management is the development factor that connects capital and labor together. Managers incorporate innovation and creativity in using the other factors that help to create a successful company.

according to the song of roland, the characteristics of an ideal knight are: loyalty to the king, skilled warriors and horseman, valiant, bold, courageous, strong and proud in battle. they should be determined to fulfil their duties and willing to die to make their people safe.