Factors Affecting Reaction Rates

Steps:

• Identify the question: factors that increase reaction rate based on collision theory and rate laws.
• Recall Arrhenius equation: rate constant k = A e^(-Ea/RT), where lower Ea or higher T increases k.
• Consider concentration: rate = k [reactants]^n, so higher concentration increases collisions and rate.
• Note incomplete choice D and conflicting claim that only A is correct, as B and C also increase rate.

Not enough information: Choice D is missing, and A, B, C all increase reaction rate; cannot confirm single correct option.

Final answer: Not enough information.