<prompt> Translate the following text to SwahiliResearchers can choose relatively freely which instance to study on any one of several bases, depending on the questions to be examined.  <response>: Watafiti wanaweza kuchagua kwa uhuru wa kipekee ni mfano gani wa kujifunza juu ya moja ya misingi kadhaa, kulingana na maswali ya kuchunguzwa. 