Two statements regarding the origin of life are given below:
$(a)$ The first organisms that emerged on Earth are believed to have been devoid of chlorophyll and incapable of respiration.
$(b)$ The first food-producing organisms were chemosynthetic and never released oxygen.
Based on the above statements,which of the following options is correct?

• A
  $(b)$ is correct,while $(a)$ is incorrect.
• B
  Both $(a)$ and $(b)$ are correct.
• C
  Both $(a)$ and $(b)$ are incorrect.
• D
  $(a)$ is correct,while $(b)$ is incorrect.