2: Randomized controlled trial (RCT) design is known as the "gold standard" level of proof. a. Elaborate why (strengths of the RCT). b. Explain when to choose other study designs over RCT (weaknesses of RCT). For both questions (2a and 2b), address the following key concepts accordingly: randomization, bias and generalizability, equipoise (ethical consideration), practice setting, costs and time spent for research, etc