Read the text and answer the question. Tom is usually quiet and prefers reading books to going out with friends. He is very intelligent and always gets good grades. However, he can be a bit shy when meeting new people, which sometimes makes him seem unfriendly, but he is actually very thoughtful. His sister, Sarah, is the opposite; she is outgoing and loves parties, but sometimes she acts a bit impatient when things don't go her way. Which statement is true about Tom and Sarah?
A) Tom is unfriendly because he is shy.