While working on a group project for school, a student asked his group member to check his model of a section of DNA. Which feedback would the student receive?

a) The model is accurate because all bases are paired correctly.
b) The model is accurate because it shows all components of each nucleotide.
c) The model is inaccurate because the base pairs are incorrect.
d) The model is inaccurate because it is missing the required bases in DNA.