answer asap!!! no need for explanation! will upvote!

Which of the following registered pension plan(s) offer no limits on contributions? I. Defined Contribution pension plans II. Defined Benefit pension plans III. Deferred Profit-Sharing plans IV. Retirement Compensation Arrangements V. Individual Pension Plans a) I and V b) IV c) IV and V d) II1,III,V Roger and Samantha had a marriage breakdown three years ago and have an existing spousal and child support arrangement, in which Roger is required to pay Samantha $3,000 a month. Now, Samantha feels the amount agreed upon was too less and would like it to be rearranged, The following are the conditions where a variation would be accepted, except: a) Samantha spoke to her friend who is a lawyer and is being told she could have received a larger amount in spousal support. b) Samantha notices a massive increase in inflation in the last three years. c) Roger and Samantha's child require extra medical expenses due to a severe illness. d) Roger's income has increased substantially in the last three years