Answer:
C. Increasing the temperature increases the reaction rate.
Explanation:
The reaction rates aren't listed in any specific order, and haven't been combined.
Increasing concentration on it's own increases the reaction rate, increasing the temperature on it's own increases the reaction rate, and adding metal on it's own increases the reaction rate.
Since the question is referring specifically to the effects that temperature has on the reaction rate of the reaction being tested, all we need to do is look at the "Original" Conditions and the "Higher temperature" Conditions on the table.
The reaction rate before changing anything (Original conditions) was 10 seconds. After increasing the temperature (Higher temperature conditions), the reaction rate was 5 seconds.
5 seconds is less than 10 seconds, which means that less time was taken for it to react, so that means that the reaction rate was faster when the temperature was increased.
