Consider the structures $(a)$ and $(b)$ provided. Which of the following is a true statement regarding these compounds?

• A
  $(a)$ is a phenol while $(b)$ is an alcohol.
• B
  Both $(a)$ and $(b)$ are primary alcohols.
• C
  $(a)$ is a primary alcohol and $(b)$ is a secondary alcohol.
• D
  $(a)$ is a secondary alcohol and $(b)$ is a primary alcohol.