Assume that you have a solution of 0.1 M glucose 6‑phosphate. To this solution, you add the enzyme phosphoglucomutase, which catalyzes the reaction:

What is the product of the reaction catalyzed by phosphoglucomutase?

a) Fructose 6-phosphate
b) Glucose 1-phosphate
c) Glucose 1,6-bisphosphate
d) Fructose 1,6-bisphosphate