School bags have wide straps so as to: (i) Increase the pressure on the shoulder. (ii) Decrease the pressure on the shoulder. (iii) Make the bag's weight fall over a small area of the shoulder. (iv) Make the bag's weight fall over a large area of the shoulder.

• A. (ii) and (iii)                     
• B. (i) and (iii)
• C. (i) and (ii)            
• D.           (ii) and (iv)
• E. None of these