A production process has six subsequent stages, each with their own specific resources and performing crucial tasks. Four of these stages have a capacity of $20$ units per hour, while the other two stages have a capacity of $10$ units per hour. What is the best conclusion?

Group of answer choices

The four stages with a capacity of $20$ units per hour can be considered bottlenecks.

There are no bottlenecks in this production process.

Both stages with a capacity of $10$ units per hour can be considered bottlenecks.

The two stages with a capacity of $10$ units per hour should be eliminated from the process.