Let's analyze the discounts offered by each store:
Store D: Offers 1/3 off the price, which is equivalent to (1/3) * $42 = $14 discount.
Store M: Offers 35% off the price, which is equivalent to (35/100) * $42 = $14.70 discount.
Store S: Offers $15 off the price.
Now let's compare the discounts:
Store D: $14 discount
Store M: $14.70 discount
Store S: $15 discount
Among these, Store D offers the biggest discount at $14.
Therefore, the statement G. Store D has the lowest sale price of $14.00 is true. (We only consider the discount amount, not the final price after subtracting the discount.)