Context: Read the passage and look at the picture.
In Iceland, parts of the Mid-Atlantic Ridge are above sea level. The Thingvellir Rift Valley is one example. This rift valley began to form as the North American Plate and the Eurasian Plate moved away from each other. In this picture, you can see the gap that formed during a major plate movement along the rift. Gaps such as this form when the two plates move apart, creating a large crack in the crust. The last time this happened in the Thingvellir Rift Valley was in the spring of 1789. Since then, a walking path was built along the rift valley to allow park visitors to walk along the rift.
Complete the sentence.
The Thingvellir Rift Valley formed at a () boundary.
A. divergent
B. convergent
C. transform
Identify the correct option from the choices provided and respond with the letter of the correct option.
Answer: A