<prompt> Translate the following text to EnglishUtafiti wa moja kwa moja wa ufanisi wa udhibiti ulitajwa mara nyingi kama njia bora ya kuamua kama mbinu za kupunguza hatari ambazo zilikuwa zimekubaliwa zilikuwa, kwa kweli, zinafanya kazi kwa ufanisi.  <response>: Directly testing control effectiveness was cited most often as an effective way to determine if the risk reduction techniques that had been agreed to were, in fact, operating effectively. 