A new gardening rake with an S–shaped handle reduces compression stress on the spine during the pull stroke to about ...

Connor on August 8, 2021

Explain A?

Can someone explain why A is the correct answer? I don't understand how they conclude that compression stress is the only source of spinal injury.

Reply
Create a free account to read and take part in forum discussions.

Already have an account? log in

Emil-Kunkin on August 12 at 07:59PM

This is not a must be true, we are not concluding A, but rather, we are using A to make the argument valid. The argument holds that since one rake is better than the other in terms of compression stress, it is better in terms of reducing spinal injury. This does not have to be true, as far as I know, compression stress is just one of many types of things that can cause spinal injury. A fixes this flaw by equating the two elements.