The correct answer is B. Alex has to cut the expenses and increase savings, so answers C and D are obviously wrong as these answers increase the expenses. Answer A is also incorrect as fixed expenses are those necessary for the normal development of the person's life, such as food, housing expenses, taxes, etc. So the expenditure cut should be made in extraordinary expenses, which are discretionary at the will of Alex, for example, leisure expenses, or unnecesary purchases. So the correct answer is B.
