Final answer:
A long delay between observing stimulus and reinforcement would result in the least number of responses.
Step-by-step explanation:
The answer to this question is B) A long delay between observing stimulus and reinforcement. When there is a long delay between observing a stimulus and receiving reinforcement, it becomes difficult for individuals to associate their behaviour with the desired outcome. As a result, they may be less motivated to respond to the observing stimulus.
For example, let's say a teacher gives praise to a student every time they raise their hand to answer a question. If the teacher delays giving the praise for a long time after the student raises their hand, the student may not make the connection between raising their hand and receiving praise. Consequently, they may be less likely to continue raising their hand in the future.