Here are the answers to your questions:
Question 1: C) Denmark
Question 2: A) avoid the inconvenience of converting currency when entering another EU country.
Question 3: D) Portugal
Question 4: A) Germany
Question 5: B) single market
Question 6: A) Spain and Denmark.
Question 7: A) promote competition, which would lower prices and improve consumer power.
Question 8: C) A Danish family attempts to pay for their meal at an Italian restaurant in Sicily.
Question 9: D) strengthen cooperation in trade and economics.
Question 10: D) Winston Churchill.
Let me know if you need further assistance!