Explanation:

- The "actual" value of variables like consumption, investment, output, etc., refers to the values that have already occurred or been realized in the economy.

- Option 1: ex post measures

- Ex post refers to "after the event"; these are actual, realized values as opposed to those that are planned or expected.

- Option 2: ex ante measures

- Ex ante means "before the event". These are projected or expected values, not the actual realized ones.

- Option 3: ex pre measures

- This term is not commonly used in economics for describing actual or forecasted values.

- Option 4: none of the above

- This is incorrect because option 1 (ex post) is a standard term.

Correct answer: Option 1, ex post measures.