Distinct cries that signals specific states or needs occur at what age? ?

a. these cries are present at birth
b. by four weeks of age
c. by four months of age
d. at mine months of age

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system