Answer:
There should be a comma after show.
Explanation:
I think C would be the best answer.
Friar Laurence is collecting herbs and plants from his garden and thinking about them out loud to himself. He thinks it interesting that some plants can help heal a person while others might be harmful, and even some plants that have both the properties to heal and to harm all in one.
There is no antecedent<span> for the word those</span>