Final answer:
North America is the only continent that touches the Arctic Circle.
Step-by-step explanation:
The Arctic Circle is located at a latitude of 90° minus Earth's tilt, which is 90° – 23° = 67°N.
Therefore, only one continent, North America, touches the Arctic Circle. Canada, which is part of North America, has several provinces and territories that reach the Arctic Circle, including Yukon, Northwest Territories, and Nunavut. So the correct answer is A) One.