The question below comprises four scattered segments of a paragraph. Identify…

In sentence/paragraph-rearrangement (para-jumble) questions, the opening sentence must stand independently — it can never begin with a word that depends on something already said (a continuation connector like 'then', 'this', 'it', 'so'). A general, self-contained premise usually opens the paragraph, followed by a sentence that broadens the theme, and only then do specific examples appear — often flagged by explicit sequencing markers such as 'First' and 'Then', which must themselves appear in that literal order.

1. Segment B ('If we are what we eat, then we are in big trouble') is a complete, self-contained statement that can open the paragraph; segment A begins with 'Then', which needs a preceding event, so it cannot be the opener.

2. Segment D ('According to some environmentalists each day brings some new horrors to light') broadens B's premise by asserting that new problems keep surfacing — a natural bridge before specific cases are introduced.

3. Segments C and A are the specific cases, explicitly marked 'First' and 'Then' respectively, so C must precede A.

4. Chaining these in order gives B, then D, then C, then A.

• The sequence starting with segment A places the 'Then' segment first, even though it grammatically depends on an event stated earlier — there is nothing for it to follow here.

• The sequence starting with segment C opens directly on the specific mineral-water example without first establishing the general premise about food and recurring problems.

• The sequence that places segment A immediately before segment C reverses the 'First...Then...' relationship between the two examples, so the second case appears to precede the first.

Reading B, D, C, A in sequence produces a coherent paragraph, matching the option with that order.