The correct answer is A.
By trying out the equipment first at a fitness club you can make an informed decision as to whether you will use the equipment at home, if you are able to use the equipment, if you will get any benefit from it, if you enjoy using it. You don't want to make an unnecessary purchase of a piece of equipment you will never use and waste your money.
Disproportionate: too large or two small compared with something else
explanation: Out of proportion, as in size, shape, or amount.
Memory loss is not part of physical change by aging
