I need help answering question 4 of my homework

For questions 3 and 4, consider the following scenario. \"Singular\" provides cellphone service to customers according to the following three pricing plans. Each consumer has the option of self-selecting the plan which they individually prefer. Fixed \" Charge Per Minute (for minutes Plan Name Mont thly Fee Free Minutes\" used beyond\" \"Free Minutes \") Plan A : ha 3 4 0 Unlimited T Plan Gamma 10 Plan Delta $21 0 .l 0 3. \"Singular\" is engaging in A. First Degree Price Discrimination {or \"Perfect Price Discrimination\"). B. Second Degree Price Discrimination (or \"Menu Pricing\"). C. Third Degree Price Discrimination (or \"Segmented Pricing\"). D. Fourth Degree Price Discrimination (or \"Reverse Price Discrimination\"). 4. Suppose that Anna wants to talk on her cellphone exactly 325 minutes per month and Benny wants to talk on his cellphone exactly 425 minutes per month. In order to consume these desired levels of service at lowest expenditure, Anna should choose Plan and Benny should choose Plan A. Alpha; Alpha. B. Beta; Alpha. C. Gamma; Beta. D. Delta; Gamma