I need some help with these problems, thank you so much!

In most countries, explicit collusion over prices or quantities between rms in the same industry is illegal. Is it possible that collusive prices can be achieved by tacit collusion? Give an explanation of how such tacit collusion can occur. Collusive prices can be achieved by tacit collusion legally. Tacit collusion can occur using 3 A. dominant strategy. 0 B. pure strategy. 0 C. mixed strategy. 0 D. trigger strategy