Which of the following statements is true of the hydroxyl functional groups in 1,3-propanediol?

A) One hydroxyl group is bonded to a 1° carbon, and the other hydroxyl group is bonded to a 2° carbon.
B) One hydroxyl group is bonded to a 1° carbon, and the other hydroxyl group is bonded to a 3° carbon.
C) Both the hydroxyl groups are bonded to a 1° carbon each.
D) Neither of the hydroxyl groups is bonded to a 1° carbon.