Consider the limit order book for Stock A Ask Volume Ask Price 324 515 395 693 511 360 488 600 S s S S S S S 1153 1148 1143 1138 1133 1128 1123 1114 Bid PriceBid Volume S 1112 1103 61098 S 1093 s 108

The bid-ask spread is the difference between the highest ask price and the lowest bid price. In this case, the highest ask price is 11.53 and the lowest bid price is 11.12. Therefore, the bid-ask spread is:

11.53 - 11.12 = 0.41

So the answer is:

b. $0.10