Objective: how to remove mildew

Which of the following solutions is more sound in terms of naive physics reasoning?

Options:
A). mix one ounce each of laundry detergent and trisodium phosphate with one quart laundry bleach and three quarts of water. Scrub the area with a soft brush and rinse with clean water;
B). mix one ounce each of laundry detergent and trisodium phosphate with one quart laundry fabric softener and three quarts of water. Scrub the area with a soft brush and rinse with clean water;
A).