Answer: Both stages with a capacity of 10 units per hour can be considered bottlenecks.
Step-by-step explanation:
From the information given in the question, the best conclusion is that both stages with a capacity of 10 units per hour can be considered the bottlenecks.
It should be noted that the bottleneck in the chain of processes, is the one that has the limited capacity and this then reduces the capacity of the whole chain and slows down production.