article: Alan is a 16-year-old boy. He is the only child in his family. Alan is an American high school student. He lives in New York. Art and music are his favourite subjects . He loves studying and also love sports. He usually goes swimming three or four times every week. Alan's father works in a restaurant  near New York. He likes swimming, too. So Alan often go swimming with his uncle. Cool water always make him happy. American students are different  from us. On Saturdays, he often has parties   with his friends and they always enjoy themselves. On Sundays, he usually studies at home and watches sports programs . His favourite drink is Coke, but Coke is an _ drink. He often eats vegetables and he often does some sports to keep healthy.
question: How many people are there in Alan's family ?
options: 1 3 4 5