Step 1: Use the mandatory-opener test first: find the sentence that can stand alone as an introduction, with no pronoun or connector that needs an earlier antecedent. Sentence A opens with "This gap", which needs something before it to define "gap", so A cannot be first. Sentence C opens with "However", a contrast word needing a prior idea, so C cannot be first. Sentence D opens with "Bridging this gap", again needing a prior mention of "gap", so D cannot be first. Only B, "Governments often announce ambitious policy reforms with great fanfare", introduces a fresh topic with no dangling reference, so B must be the opening sentence.
Step 2: Now use linking-word chaining: B talks about announcing reforms; C begins with "However" and discusses how implementing that policy is "far harder than drafting it", directly contrasting with B's "great fanfare". So C follows B.
Step 3: A begins "This gap between intention and outcome", which is exactly the idea C just introduced, the gap between the drafted policy and the harder task of implementing it, so A follows C, naming that gap the "implementation problem".
Step 4: D begins "Bridging this gap", referring back to the "implementation problem" just named in A, and gives the concluding requirements (institutions, funding, will), which is a natural closing sentence.
Step 5: Chaining B then C then A then D produces a coherent paragraph, matching option (c).
Correct option: (3) BCAD.