You will be given a definition of a task first, then some input of the task.
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.

Question: What is the current population of the city where many banks were over-leverage after the end of the Seven Years' War? Passage:The Amsterdam banking crisis of 1763 in the Netherlands followed the end of the Seven Years' War. At this time prices of grain and other commodities were falling sharply, and the supply of credit dried up due to the decreased value of collateral goods. Many of the banks based in Amsterdam were over-leveraged and were interlinked by complex financial instruments, making them vulnerable to a sudden tightening of credit availability. The crisis was marked by the failure of one large bank - that of De Neufville - and many smaller financial enterprises. The extent of the crisis was mitigated by the provision of extra liquidity by the Bank of Amsterdam, the Dutch central bank. Similarities have been identified between these events and the financial crisis of 20072008.
Links: a. Bank b. Amsterdam c. Collateral (finance) d. Collateral (finance)
Output:
b