Which of the following is an example of a time delay? 

A)  A fox eats a rabbit. 
B)  A smoker develops lung cancer. 
C)  A largemouth bass eats a salmon fry. 
D)  Higher altitude causes oxygen deficiency.

A time delay involves a time gap between an action and its consequences. In the case of a smoker developing lung cancer, there is a time delay between the smoking behavior and the onset of cancer. The other options do not involve a significant time delay in the cause-and-effect relationship.