Which of the following would best help the researcher determine how well the enzyme is working? (AKS 1a2)(DOK 2) Question 19 options:

a. The researcher should measure the amount of product at the end of the reaction.

b. The researcher should measure the amount of enzyme remaining after the reaction.

c. The researcher should measure the temperature during the reaction.

d. The researcher should measure the amount of substrate at the beginning of the reaction.