Consider the following situations that would warrant a study of the layout
1. Change in the work force
2. Change in production volume
3. Change in product design
4. Competition in the market
The situation (s) that would lead to a change in the layout would include
(a) 1,2,3 and 4 (b) 1,3 and 4
(c) 3 alone (d) 2 alone