—What does the sign"" mean?

—It means "______". [ ]

A. Turn left

B. No crossing

C. Cross road

D. Don't turn left

4个月小儿，反复发作性吸气困难，伴吸气时喉鸣5～6次，间歇期正常，无发热及声音嘶哑，体温及心肺腹均正常，最可能的诊断

A．气管异物
B．喉痉挛
C．喘息性支气管炎
D．急性喉炎
E．窒息