Select the correct text in the passage. Which sentence shows the main idea of the passage?
Everywhere we go, we are hit by ads to eat junk food. That flyer over there tempting us with a delicious hamburger. That woman on the TV biting into a juicy chicken leg. Our favorite teen pop-star chugging down a sugary drink. Advertisements for junk food surround us everywhere we turn in modern city life. It’s no wonder then, that advertisements have played a huge role in increasing the amount of junk food children eat every day.

Experts in children’s health say that junk food companies spend billions of dollars on ads for kids. These experts say that the only way to prevent kids from eating large amounts of unhealthy food is to strengthen laws that control advertisers. Some countries have already taken steps to protect children from such advertisements. For example, Sweden does not allow fast-food companies to make ads for children under 12.