For rate law rate = k [A][B], overall order and how to determine exponents?

• A. Overall order is 2; vary [A] and [B] independently to observe rate changes
• B. Overall order is 3; vary [A] and [B] independently to observe rate changes
• C. Overall order is 1; measure temperature only
• D. Overall order is 2; vary temperature to observe rate changes

Answer: (A)