Which One of the Following Statements Concerning Measures of Productivity

Which one of the following statements concerning measures of productivity is FALSE?

A) Measures of labour productivity are generally more informative than multifactor measures of productivity.
B) Multifactor measures of productivity must convert the quantities being measured to a common unit of measure such as dollars.
C) The number of insurance claims processed per week by employees in an insurance company is a valid measure of productivity.
D) Productivity is measured as the ratio of outputs divided by inputs.