Solution

Correct Answer: (iv) All of the above

Explanation

Independent modules (low coupling, high cohesion) are easier to maintain/test because:

• (i) Code modification limited - Change isolated to one module, no ripple effect
• (ii) Reusable modules possible - Independent modules can be plugged elsewhere
• (iii) Error propagation reduced - Fault in one module less likely to affect others, easier to locate

Hence all three are benefits, so (iv) All of the above.