单选题 Which of the following activities is NOT done by Americans to celebrate Christmas?

• A.They send dozens of Christmas cards or "season's greetings" to relatives, friends and business associates.
• B.They enjoy a traditional Christmas dinner—turkey, pumpkin pie and Indian Pudding.
• C.They join with friends and walk from house to house singing the traditional carols of Christmas.
• D.They decorate homes and churches with evergreens.