Read the passage: 'Regular handwashing is one of the most effective ways to prevent the spread of illness. Soap and water remove germs from the skin, reducing the chance of infection. Health experts recommend washing for at least twenty seconds.' What is the main idea?

a.Handwashing is an effective way to prevent the spread of illness.
b.Soap is expensive to buy.
c.Germs cannot be removed from skin.
d.People should wash for one minute.

Giải thích

The main idea is the central point the passage develops, stated in the first sentence. The details about soap and time support that point rather than serving as the main idea.

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