Read the sentence. The completed charcoal, however, was a cherished resource.
Select the statement that BEST explains why the author chose to include this sentence.
a. It explains that charcoal took a long time to produce.
b. It shows that charcoal was an extremely important material because it was used in many ways.
c. It explains that people loved the process of making charcoal in medieval times.
d. It shows that people treasured charcoal because it was so easy to find.