I think that it is the bone system please tell me if right
It is much likely that the mother will suffer from pneumonia. Fetus is likely to suffer from birth defects known as varicella syndrome if it occurs at a gestation of 8-20 Wks (skin scaring, underdeveloped arms and legs, incomplete brain development)
if the infection is within 48yrs before a delivery child may suffer from neonatal varicella which is life-threatening
Water, food, movement source.
I believe the answer is C. Apes have shorter legs than humans (hominids), therefore the answer is C