In the following passage some of the words have been deleted, Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Intriguingly, those who ( I ) ____________ the psychobiotic diet reported they felt less stressed compared (2) ____________ those who followed the control diet. There was also a direct correlation between how strictly (3) _____________ followed the diet and their perceived stress levels, will those who (4) ____________ more psychobiotic foods during the four-week period reporting the (5) _____________ reduction in perceived stress levels.