What is the anwser pls and thanks

Which of these choices show a pair of equivalent expressions?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

What point is the projection of q on a) r b) s c) t