A manutacturing process requires 12 minutes of labor to make 10 units of production. Which of the following actions will increase productivity? 1. Increase labor per 10 units of production 2. Decrease labor per 10 units of production 3. Increase number of units per 10 minutes of labor 4. Decrease number of units per 12 minutes of labor A. 1 and 3 only B. 2 and 3 only C. 1 and 4 only D. 2 and 4 only