RANT means to speak at length in an angry, impassioned, or noisy way, typically about something that annoys you. Option C (To preach noisly) captures this - though 'noisily' is misspelled, it conveys speaking loudly and emphatically about something. Option A (Praise inordinately) is the opposite. Option B (Formalise) means to make formal, unrelated. Option D (Treat with screen) appears to be a garbled distractor.