A soda manufacturer claims that its Strawberry Fizz soda has more carbonation than a competitor's Strawberry Orbit soda. Bottles of both types of soda are opened, covered with a balloon, and then shaken. The diameter of each balloon is then measured. The mean balloon diameters are 2.3 inches for the Strawberry Fizz soda and 2.1 inches for the Strawberry Orbit soda. A 90 percent confidence interval to estimate the difference in mean diameters, in inches, is (-0.8, 1.2). Which of the followng claims is supported by the interval?

Because the interval has more positive values than negative values, Strawberry Fizz has more carbonation.

Because 2.3 and 2.1 are very similar, there is no difference in the mean carbonation amounts.

Because 2.3 is larger than 2.1 inches, the manufacturer is correct, and Strawberry Fizz has more carbonation.

Because the interval contains 0, it is possible that there is no difference in mean carbonation levels.

The interval cannot be interpreted because negative measurements are not possible.