Answer: The option that has a synonym restatement is B. Werner Faymann became the prime minister, or chancellor, of Austria.
Explanation: A synonym is a word or phrase that shares a meaning or a very similar meaning with another word or phrase. In sentence B., the term "prime minister" is restated by using one of its synonyms: "chancellor". In Austria, the the word "chancellor", as well as "prime minister", makes reference to the title of head of government. Therefore, in sentence B., "or chancellor" is a synonym restatement for "prime minister".
