Take context from the input text and decide on the accurate relationship between 'Merkel' and 'Germany' from the options provided.
Options: product/material produced, stock exchange, headquarters location, founded by

Historical comparisons were also made at the summit in Brussels that agreed the deal, with Merkel asked whether the tough conditions were not similar to the 1919 Versailles treaty that forced crushing reparations on Germany after World War One, with disastrous consequences.
headquarters location