Rearrange the following sentences to form a coherent paragraph:
1. The rapid spread of misinformation and disinformation on social media platforms represents a major challenge to public discourse.
2. This method involves a systematic verification of facts, claims, and sources to provide a credible assessment of accuracy.
3. This phenomenon can erode public trust in news sources and undermine informed decision-making in a democratic society.
4. As a result, professional fact-checking organizations have emerged as a critical line of defense against the proliferation of false narratives.

Correct option is C

Option (c) 1, 3, 4, 2 is the correct order of the given sentences.
Explanation (why this order is correct):
• 1 introduces the main issue: the spread of misinformation is a major challenge.
• 3 logically follows because “This phenomenon” clearly refers to misinformation/disinformation and explains its harmful effects (eroding trust, undermining decisions).
• 4 comes next because “As a result” shows a response/solution emerging due to the problem and its impact—fact-checking organizations arise as a defense.
• 2 should follow 4 because “This method” refers to fact-checking, and sentence 2 explains what fact-checking involves (verification of facts and sources).