Which out of the following are correct about R.G. Collingwood's theory of history?

A. All history is the history of process of events.

B. History is concerned with the purposeful actions of individuals.

C. Historian's methods is a detective's method.

D. The writing of history is through re - enactment of the thoughts of past actors in the minds of the historian.

E. His philosophy of history has been characterized as 'radical historicism'.

Choose the Correct answer from the options given below: