Multi-select problem: How does the next paragraph end?

How to determine if you had a miscarriage
Understand why miscarriages happen.
Miscarriages most often occur in the early weeks of pregnancy. Chromosome abnormalities are the most common cause, and in most cases there's nothing the mother could have done to prevent it.

pick from the following. (a). There are three main examples of loss of the baby and miscarriages : The mother is unfaithful. A " miscarriage " occurs because the mother is convinced that something wrong is happening, and the fetus isn't growing properly.; (b). Miscarriages don't last long, making it common for women to experience birth defects along the way. You should know why they happen, as they take place as a natural occurrence of miscarriage, rather than an event unrelated to the miscarriage.; (c). The risk of miscarriage drops after thirteen weeks of gestation. By then, most chromosome abnormalities would have already caused the pregnancy to end.; (d). Most miscarriages occur suddenly in the early years of pregnancy. Some women have one or more miscarriages throughout pregnancy.;
(c).