Read these lines from "the truth about antibacterial soap": in addition, antibacterial soap may do harm. first it kills both beneficial and harmful bacteria. second, scientists believe bacteria may become resistant to antibacterial agents over time, especially if they are not used correctly. which best summarizes the main idea of the text? antibacterial soap causes resistance in some bacteria. antibacterial soap harms mainly beneficial bacteria. antibacterial soap may have harmful effects. antibacterial soap should be used correctly at all times.