The observation that most likely led to Jenna’s conclusion is a change of odor. Thus, the correct option is A.
What are Chemical changes?
Chemical changes may be defined as those changes through which one chemical substance gets transformed into another chemical substance. This occurs in a variety of steps and types.
A difference in the smell of leftover mashed potatoes indicates the change in odor which is observed by Jenna.
A decrease in temperature, a change in moisture, and a decrease in mass do not make any sense with respect to difference in smell.
Therefore, the observation that most likely led to Jenna’s conclusion is a change of odor. Thus, the correct option is A.
To learn more about Chemical changes, refer to the link:
https://brainly.com/question/19794032
#SPJ6
