B will me the right answer
Indroduction - Washing our hands is essential to
prevent the spread of infectious
diseases.
Body - Germs pass from our hands to our
mouths when we handle food with
unwashed hands. A number of infectious diseases such as
influenza, hepatitis A, or gastroenteritis
can spread from one person to another
through touch. A good practice is to wash your hands
with liquid soap for 15 to 20 seconds
or longer.
Conclusion - You can now see how just a little time
spent washing your hands can save
you from some major illnesses.
Repetition: Allows the audience to understand the message of the text because it is repeated.
Overall, this sentence seems correct to me.
