A student carried out an investigation into how altering light intensity affected the diameter of the pupil in the eye. The table presents the findings. Initial pupil diameter $= 8\,\text{mm}$, final pupil diameter $= 2\,\text{mm}$. Which explanation of the student’s results is correct?
- AA reduced light intensity reduced the pupil diameter by $75\%$.
- BA reduced light intensity reduced the pupil diameter by $25\%$.
- CAn increased light intensity reduced the pupil diameter by $75\%$.
- DAn increased light intensity reduced the pupil diameter by $25\%$.