C. What is mentioned as a cognitive benefit of language learning? 1) It makes you more creative. 2) It improves memory and problem-solving. 3) It helps you learn other subjects faster. 4) It makes you a better public speaker.

Во втором абзаце текста сказано: "Secondly, learning a new language enhances cognitive abilities. Studies have shown that it can improve memory, problem-solving skills, and multitasking." Это точно соответствует второму варианту ответа.

Ответ: 2) It improves memory and problem-solving.