B. What did Margaret do after school when the weather was fine? 1) She read books. 2) She played games. 3) She walked in the park.

В тексте сказано: "Margaret liked to go to the park in the afternoon after school when the weather was nice".

Следовательно, когда погода была хорошая, Маргарет гуляла в парке.

Ответ: 3) She walked in the park.