Which of the following statements about alternative performance measures (APM's) is generally true?

a) APM's generally result in more conservative performance measures than those reflected in the statement of profit and losses

b) It is considered good practice for APM's to be given greater prominance than financial statement measures

c) APM's are often used for executive compenation and employee remuneration

d) Measures of 'Free Cash Flow' and 'EBITDA' are consistently defined and applied