What is the most frequent cause of repetitive motion disorders? a. design flaws in the workplace b. employee negligence c. unsafe work procedures d. weak back muscles

A and C, it could be. But flaws in the design of how a place is structured and how to go about working there is a large thing too. 

God she she is dudhe es se did she is d

After spending all that time on the research then by all means modify the hypothesis or aim by reporting such. for example the findings did not bring forth what was expected but brought about different yet interesting findings worth exploring so the hypothesis is changed to reflect this new findings.

i may be way off but.