Choose the most logical order of sentences from among the four given choices to construct a coherent paragraph.
A. The possibility of substituting ‘recycled’ wasted-water or effluents for purposes other than drinking and cooking should be probed.
B. Recycled water, however, may be supplied by an independent service line and offered at lower tariff in order to encourage its use for all requirements except, perhaps drinking.
C. The recycling system, already perfected, consists of filtration through various media and, where needed, treatment with chemicals.
D. In fact, public health officials vouch for the purity and safety of recycled water and recommend its use for all purposes.

Correct option is D

The correct sequence is CDBA.
· C introduces the recycling system and explains the process of treating water. This serves as a foundation for the discussion.
· D follows logically by stating the endorsement of public health officials regarding the safety of recycled water, building trust in its use.
· B proposes practical ways to encourage the use of recycled water by introducing an independent service line and offering it at a lower tariff.
· A concludes the paragraph by suggesting exploring the substitution of recycled water for non-drinking purposes, reinforcing the overall idea.