Correct answer: A. Slow moderate methods and desire for active politics
Explanation: The direct answer is A: slow moderate methods and the desire for more active politics. The Extremists, also called Assertive Nationalists, became prominent in the Indian National Congress when many nationalists felt that petitions, prayers and constitutional appeals used by the Moderates were too slow. They wanted Swaraj, boycott, Swadeshi, national education and broader public participation. Option A is correct because this dissatisfaction encouraged a more forceful political approach. Option B is wrong because the Extremists opposed colonial domination rather than fully supporting British rule. Option C is wrong because the Congress did not end; the debate occurred within the national movement. Option D is wrong because the Battle of Plassey happened in 1757 and was not the immediate cause of this later political group. Bal Gangadhar Tilak was a major leader, along with Lala Lajpat Rai and Bipin Chandra Pal. Memory cue: Moderates asked gradually; Extremists demanded action and Swaraj.