The percentage of hamstring injury is at 51.7%
I think it’s A
I think so because the Synovial membrane acts as a lubricator, much like how oil lubricated the joints of the tin man. If the lubricants were removed, the friction would increase as there is no oil to decrease the friction and let the bones function properly
Unexpected means it was something you did not "expect" to happen such as a car crashing into you which means this is wrong.
Unfair is any injury.
Unnecessary means it was never needed and could have been prevented/not done therefore unnecessary is the best term.