Statement $A:$ Every species has a unique genetic makeup.
Statement $R:$ There is genetic variation in reproduction among all animals.

• A
  Statement $A$ and Reason $R$ are both true. $R$ is the correct explanation of $A$.
• B
  Statement $A$ and Reason $R$ are both true. $R$ is not the correct explanation of $A$.
• C
  Statement $A$ and Reason $R$ are both false.
• D
  Statement $A$ is false. Reason $R$ is true.