In comparing two reactions, the reaction with the greater activation energy always has (a) the slower rate. (b) the faster rate. (c) the rate that varies less with temperature. (d) the rate that varies more with temperature.

D the rate that varies more with temperature

Explanation: reaction with greater activation energy is not feasible ordinarily as the reacting molecules have little or no energy to overcome the activation energy. But as the temperature of the reaction is increased, the reacting molecules gains more energy to overcome the energy barriers(activation energy) hence proceeding to form products. In this case, the rate of the reaction depends on the temperature. So an increase in temperature will increase the kinetic energy of the molecules thereby increasing the rate of the reaction and a decrease in temperature will leads to a decrease in the rate of the reaction.

"the periodic table is arranged in order of atomic number."