A woman gives birth to a small infant with a malformed skull.

The infant grows abnormally slowly and shows signs of substantial cognitive and intellectual deficits.

The child also has facial abnormalities including a short nose and thin lip that become more striking as it develops.

The correct answer is choice A.

Choice A rationale:

An internal examination could disturb the placenta and cause profound bleeding, which is a life-threatening condition for both the mother and the fetus.

Choice B rationale:

While there is always a risk of introducing infection during an internal examination, this is not the primary reason to avoid it in a client with placenta previa.

Choice C rationale:

An internal examination could potentially initiate preterm labor, but this is not the primary concern with placenta previa.

Choice D rationale:

While there is a risk of rupture of the amniotic membranes during an internal examination, this is not the primary reason to avoid it in a client with placenta previa.

The correct answer is choice C.

Choice A rationale:

Sitz baths cause perineal vasodilation, not vasoconstriction, and this does not directly affect bleeding.

Choice B rationale:

The duration of a sitz bath does not necessarily correlate with its therapeutic effect.

Choice C rationale:

Sitz baths increase the blood supply to the perineal area, promoting healing and providing relief from discomfort.

Choice D rationale:

Sitz baths do not increase the risk of postpartum infection when done properly.