2. The writer says that a. it takes more muscles to smile than to frown. b. it takes more muscles to frown than to smile. c. it takes the same amount of muscles to smile and frown.

Решение:

В тексте сказано: "First, it is easier to smile than to show unhappiness. In fact, it only takes 17 muscles to smile. On the other hand, it takes 43 muscles to show unhappiness." Это означает, что для улыбки требуется меньше мышц, чем для хмурости.

Ответ: b. it takes more muscles to frown than to smile.