Put two frogs one in container A and the other in container B. Container A has no holes but container B has holes in it. After a day, it was observed that the frog in container A died. What is the reason?

• A.  Container A is poisonous but container B is good
• B.  To live, frogs need to breathe in air which is available in container B but not in container A  
• C.  The frog in the container A is weak and the frog in the container B is strong
• D.  Containers without holes are bad