Answer: 10-month-old infants
Explanation:
According to the research ,10-months to 12 months infant have better tendency to perceive different between language than adults .They can approach the rhythmical difference in the languages such as English, Japanese, French etc.
According to the question, 10 month old babies have the tendency to differentiate between different sounds of many languages because of high level of detection of tones and sound .They respond in different manner towards language.