Answer:
A. The first reason that teen brains are more sensitive to junk food is that they are still developing the ability to assess risks and control actions.
Explanation:
The sentence supporting the conclusion that <u>teenager's brains change over time</u> is the<em> first sentence from the selection</em>.
The first sentence provides some context clues such as the word "developing." This word can be associated with the phrase, <em>"change over time."</em> To develop is to become more mature, which is definitely a change. This means that the reason for the change relies on the development of the teenager's ability to assess risks and control his/her actions, which means when they get older, <u>they become more capable of choosing healthier options.</u>
Choices B, C and D <em>do not provide any support regarding the development of the brain. </em>They only state some facts regarding the function of the prefrontal cortex and which part of the brain the change occurs.
