Write the next sentence in the following story.

How to care for hemorrhoids postpartum
Learn how hemorrhoids develop.
Hemorrhoids are caused by an increased pressure on the veins in the anus or rectum. The pressure can make a weaker portion of the vein weaker, which causes it to balloon a little, either inside the rectum or outside the body near the anus.

Choices: (I) You can properly care for hemorrhoids using helpful medical techniques that help relieve the pressure. Look for enlarged veins or bleeding vessels.. (II) Hemorrhoids develop because of a lack of blood flow to the veins. This pressure causes a decreased blood flow to each vein.. (III) It may occur anywhere in the rectum, which is where the fluid also collects. Most hemorrhoids are treated by surgical surgery to remove the sac, a thick, clear fluid that collects and wraps around the skin.. (IV) It is common for pregnant women to develop hemorrhoids because of the extra weight and pressure from the baby. Pregnancy also increases the risk of constipation, which is another risk factor of hemorrhoids... The answer should be
(IV)