Based on their research, some scientists believe that ________

a. adolescents who commit violent crimes should be tried as adults because their cognitive abilities and moral reasoning abilities are like those of an adult.
b. full neurological and cognitive maturity often does not occur until about age 25, and many teenagers who commit crimes should be considered "less guilty by reason of adolescence."
c. the human brain is fully developed around 10 years of age, so the risky, dumb, or criminal things adolescents do should be blamed entirely on hormonal changes.
d. adolescents should be considered as adults in the eyes of the law as soon as they have completed puberty, because physically they are adults at that point.

Answer: b