Which MOST CLOSELY identifies a theme in this passage? A) Regret is destructive and leads to anger and hostility.
B) We must learn from our mistakes and make amends for all past errors.
C) It is better to think about future plans than to focus on past regrets.
D) It is better to express emotions privately than to communicate them publicly.

B)

Explanation:

It is the theme of the passage.

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation:

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.