The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

Today roughly 17% of American kids and teens are obese, and parents cite obesity as a top concern for their children’s health. Yet with so many other overweight kids in the class, it appears that parents can’t recognize - or admit it to themselves - when their child is too heavy.
Parents may （） to realize it when their children are overweight.