Question

Three tests were given to al participants. Afterwards each participant was able to

select a snack.But before the tests began, informed consent  was  obtained.
 (rewrite  in  logical  sequence)

Answer 1

Three tests were given to all participants. But before the tests began, informed consent was obtained. Afterwards each participant was able to select a snack.

Can you change the wording in the sentences?
Hope this helps.