Which one is the correct answer: A or D? Please give a proper explanation.

After his agent delivers his UL policy, Bob wants to know whether there will be any difference in premiums if he decides to pay premiums annually instead of monthly. Bob also wants to know whether there is any advantage of paying premiums annually, as he plans to minimally fund his policy. Which of the following statements is correct? A There is a modal factor used for UL policies that will reduce his overall premium if he pays the premium annually. B There is no modal factor for UL policies and therefore, he will not save by paying premiums annually. C There is no modal factor for UL policies but paying his policy monthly will increase his cash value. D There is a modal factor used for UL policies that will increase his overall premium if he pays the premium annually