A pregnant client, at 16 weeks' gestation, has a hematocrit of 34%. Her pre-pregnancy hematocrit was 40%. Which of the following statements by the nurse best explains this change?

Because of your pregnancy, you're not making enough red blood cells.

You're not eating enough iron-rich foods like meat.

This change may indicate a serious problem that might harm your baby.

Because your blood plasma volume has increased, your hematocrit count is lower.