问题详情

Which of the following is suggested by computer experts？
[ A] Don " t rush to open any e-mail attachment.
[ B ] Never open any e-mail attachment.
[ C] It " s always safe to open an e-mail attachment from a friend.
[ D] Whenever you receive an e-mail, you should make a call to make sure whom it comes from.请帮忙给出正确答案和分析，谢谢！