What would increase the reaction rate?

Enzymes can increase the rate of a reaction by lowering the activation energy needed for the reaction

Catalyst would increase the reaction rate.

Explanation:

The rate at which the chemical reaction occurs is controlled by a number of factors and catalyst is the most suitable answer because irrespective of the type of reactants involved and the type of reaction, a catalyst always increases the speed of the reaction no mater what as it is independent. Other factors which influences the reaction rate are temperature, increasing the concentration of the reactants, e.t,c.

it has to be b, about 97 percent.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)