There are already 1,800 gallons of water in a swimming pool. If water is filling the pool at a rate of 40 gallons per minute, which expression indicates the amount of water, in gallons, in the swimming pool after m minutes?%0D%0A A. %0D%0A(1,800 + 40) ÷ m%0D%0A B. %0D%0A1,800 - 40 × m%0D%0A C. %0D%0A1,800 ÷ 40 × m%0D%0A D. %0D%0A1,800 + 40 × m

D. 1,800 + 40 × m