【单选题】Reading Task 3 : Understanding the main argument Look at the following sentences and decide which one summarizes the main argument of the text most accurately.
A.
a) Most experts today agree that babies mainly develop as a result of the environment in which they live, and that the type of adult they become is determined by the early training they are given.
B.
b) According to current opinion, a combination of natural development before and afterbirth, and the experiences which infants have, influence their processes of maturation.
C.
c) Today, scientists believe that humans evolve into their final adult form as the result of biological processes which alone determine the development of motor skills and the ability to speak.
D.
d) There have been many debates about the main influences on early human development throughout history, and even now, many scientists are unable to agree about this issue.