In an Approximate Number Sense Experiment, Researchers Observed That 9-Month-Old

In an approximate number sense experiment, researchers observed that 9-month-old Jasmine was able to distinguish number arrays that differed by a ratio of 2:3, while 6-month-old Kylie was not. What can we conclude about the about the two infants' number sense?

A) Jasmine is able to mentally represent numbers, while Kylie is not.
B) Jasmine has learned to count, while Kylie has not.
C) Jasmine has a more developed approximate number sense than Kylie.
D) Jasmine is able to deal with bigger numbers than Kylie.
E) Jasmine has gained the ability to understand ratios, while Kylie has not.