Ben Jones was walking home from school one day when he saw a black cat. It was walking across the srteet in front of him.Ben stopped, turned around, and walked down a different srteet to go home. Why did he do that? "It's unlucky when a black cat crossed the street in front of you," says Ben, "I did not want to walk down that street!" Many people think that some things bring bad luck or good luck. For example, some people think that 13 is an unlucky number. They never invite 13 people to a party. "I never walk under a ladder  ," says Ben. "And I never open an umbrella inside the house. They both bring bad luck." And what brings good luck? "We have a horseshoe over the front door of our house for good luck," says Ben."And when I find a peney on the ground, I always pick it up. That brings me good luck all day!" Which of the following things can bring people good luck?
Opening an umbrella inside the house. Walking under a ladder. Picking up a penny on the ground. Seeing a cat.