Context: This passage describes a chemical reaction. Read the passage. Then, follow the instructions below.
Honeybees make honey from nectar that they collect from flowers. Nectar is a clear liquid that contains a sugar called sucrose. After a bee collects nectar from a flower, chemicals in the bee's body break down the sucrose into a mixture of fructose and glucose, two simpler sugars. The bee then deposits this mixture into a honeycomb and seals the honeycomb with wax.
Complete the sentence.
In this chemical reaction, sucrose is a ().
A. reactant
B. product
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

A