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.

A friendly dog can make older people feel less isolated — and it appears to make little difference if that wagging tail belongs to a robot doggie or the real thing. Researchers compared a real dog with a far-from-lifelike robot dog, to see how residents of three U.S. nursing homes would respond.
Robot as good as real dog can ease （） people.