During pregnancy, which of the following impairs placental development by reducing blood flow that is likely to lead to a reduction of oxygen and micronutrients to the growing infant?

A) smoking cigarettes
B) consuming alcohol
C) dieting
D) becoming morbidly obese

Placental Development

The process by which the placenta forms and matures to support fetal development during pregnancy.

Smoking Cigarettes

The act of inhaling and exhaling the smoke produced by burning tobacco in rolled paper.

Micronutrients

Essential vitamins and minerals that organisms need in small quantities for proper health and development.