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.