Which One of the Following Is NOT True of Transitional

Which one of the following is NOT true of transitional matrices?

A) They show the proportion (or number) of employees in different job categories at different times.
B) They are useful for charting historical trends in the company's supply of labour.
C) Under stable conditions,they are useful for developing future strategies to redress labour shortages or surpluses.
D) They are useful in predicting external labour market trends.
E) They answer the questions: "Where did people who were in each job category go?" and "Where did people now in each job category come from?"