Because estuaries often have a high volume of sediments moving through them to the sea, the introduction of a barrage reduces their disperse and accumulates concentrations of pollutants within the basin, leading to increased bacteria growth.
(A) A barrage stimulates bacteria development by increasing contaminants that prevent soil deposits in tidal river areas from spreading out the ocean.
(B) Increased bacteria levels resulting from the buildup of pollutants are often found in estuaries with dams, as these stunt the dispersion of sediments.
정답은 (B)인데, (A)랑 (B)랑 뭐가 다른지 모르겠어요.
하나 찾아낸게 within the basin -> (A) in tidal river areas랑 (B) in estuaries with dam (V) 인데..
정답 이유가 이게 맞나요..?