Which of the following support(s) the hypothesis that miscarriages may be favored by natural selection for embryos that are unlikely to survive?

A) In humans, miscarriages can reduce nine months of investment to a month or less for embryos unlikely to survive.
B) Many human embryos with abnormal chromosome numbers result in miscarriages in the first trimester.
C) Most embryos with normal chromosome numbers continue to term.
D) all of the above

Miscarriages

The spontaneous loss of a pregnancy before the fetus is able to survive outside the womb, typically defined as before 20 weeks of gestation.

Natural Selection

A mechanism of evolution where organisms better adapted to their environment tend to survive and produce more offspring.

Chromosome Numbers

The total count of chromosomes present in the cell nucleus of an organism, distinct for each species, important for genetic stability and determining species' characteristics.