commas between either, or, and or both?

0

Which version/versions below are correct?

 

All of the reviewed engines were either too heavy or underpowered or both.

 

All of the reviewed engines were either too heavy, underpowered or both.

 

All of the reviewed engines were either too heavy or underpowered, or both.

 

Is there a better way to write this sentence?

I want to express that some of the engines were too heavy, some were underpowered, and some were both too heavy and underpowered.

 

Thanks!

asked Mar 11 at 04:59 Katie New member

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