Concept:Compare two recurring decimals by expanding them into infinite sequences and checking digits from left to right.Explanation:First, write the target value 0.72ˉ as 0.727272… .Now expand each option:Option A: 0.71ˉ=0.711111…Option B: 0.73ˉ=0.733333…Option C: 0.70ˉ=0.707070…Option D: 0.71ˉ=0.717171…Compare the digits starting from the tenths place: all have 7 in tenths, so move to the hundredths place.Target has 2 in hundredths. Option A has 1, Option B has 3, Option C has 0, Option D has 1.Only Option B has a hundredths digit (3) greater than 2, so 0.7333…>0.7272….Thus, only 0.73ˉ is greater than 0.72ˉ.