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.

Researchers found that of all the forms of inactivity they examined, television-viewing was the worst. It was linked to significantly higher blood pressure in children — the more TV kids watched, the higher their blood pressure — and the effect held true regardless of whether a child was heavy or at a healthy weight.
The （）​ between TV watching and high blood pressure in children.