I think it's D but don't take me on that because it's a high school question and i'm in middle school lol.
Dr. Nguyen is analyzing the duration, tone, and loudness of infants' cries immediately after they receive their first inoculation. dr. nguyen is most likely engaged in a study of t<u>emperament.</u>
<u></u>
<h3>What is an individual's temperament?</h3>
temperament, in psychology, an element of personality concerned with emotional qualities and reactions and their speed and intensity; the term often is utilized to refer to the overall mood or mood pattern of a person.
<h3>What is an illustration of a temperament?</h3>
Temperament is defined as the parts of our personalities, such as being outgoing or being shy, that we are born with. Children are born with their own individual way of reacting to or enduring the world around them that is innate, rather than known or something that they choose.
To learn more about Temperament, refer
brainly.com/question/6683393
#SPJ4
Yes indeed, Im sure they are
Answer is B they make-up all matter