Researchers are developing low-cost devices. These devices can detect water pollutants in rivers and lakes

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Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

Question. Researchers are developing low-cost devices. These devices can detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices that can detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices to detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices so that they can detect water pollutants in rivers and lakes.

Researchers are developing low-cost devices who can detect water pollutants in rivers and lakes.

Giải thích

Đáp án A

Dịch: Các nhà nghiên cứu đang phát triển các thiết bị giá rẻ có thể phát hiện các chất gây ô nhiễm nước ở sông hồ.