If a market maker posts a quote of 10.00 - 10.10[25x10], which of the following actions is the market maker willing to take?
a) Sell 1,000 shares at $10,000 and buy 2,500 shares at $10.10
b) Buy 2,500 shares at $10,000 and sell 1,000 shares at $10.10
c) Sell 100 shares at $10.00 and buy 250 shares at $10.10
d) Buy 250 shares at $10.00 and sell 100 shares at $10.10