Q34:
At an auction, each of the bids on a certain clock after the first bid was $100 greater than the immediately preceding bid. What was the amount of the last bid on the clock?
(1) The first bid on the clock was $450.
(2) The fourth bid on the clock was $300 less than the amount of the last bid.
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only (2) can solve the key is 7.
why the answer key is C? | 
