Which of the following has a synonym restatement?
a. a watershed is a formation of land that divides flowing water.
b. werner faymann became the prime minister, or chancellor, of austria.
c. i wish i could stop writing, my hand hurts, but my teacher will not tolerate it.

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".  

i guess you are missing the idea that has to be supported, am i right?