在什么情况下景点讲解员需向游客进行道歉？

A. 越大
B. 越小
C. 一样

A. 着火延迟期
B. 速燃期
C. 缓燃期

A. can be absorbed through the skin
B. causes irreversible damage to eye tissue
C. is a very unstable product
D. All of the above