Explanation

Look for factors making the product a multiple of 1000: 70 × 75 = 5250 = 21 × 250. Multiplying further by the even factor 76 gives 5250 × 76 = 399000, which ends in three zeros. Since the full product 70×71×…×79 contains these factors, it is divisible by 1000. The remainder is therefore 0 — option D.