Consider the following statements.
1. Training is required at different levels, namely, for unskilled worker, semi-skilled workers, skilled workers, office, staff, supervisory staff and managerial.
2. Semi-skilled workers are selected amongst the unskilled workers who have made themselves convergent with the handling of the machine.
3. Management training has become an essential activity of every firm.
4. Training programmes should not be periodically evaluated to determine its effectiveness.
Which of the following statement(s) given above is/are correct?

A. Both 1 and 2

B. 1, 2 and 3

C. Only 2

D. All of the above

Answer: Option B