Detailed Instructions: In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Q: Question: Which national road is longer - the one that runs between Tornio and Kilpisjarvi, or the one that runs near the western shore along most of the border? Passage:Through the entire river border, near the eastern shore, the Finnish national road 21/European route E8 runs between Tornio and Kilpisjarvi. The Swedish national road 99 runs near the western shore along most of the border. Bridges across the river border can be found in Karesuvanto/Karesuando (road 959/E45), Muonio (road 954/404), Kolari (road 943/403), Pello (road 937/402) and in Aavasaksa/Overtornea (road 98). There are also two river bridges in Tornio (one carries the European route E4, also Finnish national road 29), but they don't cross the border. The border is crossed by three roads in Haparanda/Tornio. South of the centre, the Torne River Railway Bridge crosses the river and the border.
Links: a. European route E8 b. Karesuando c. European route E8 d. Overtornea
A:
a