The book in ABC stock is

$\backslash$table$[[,$Trader,Time,Price,Quantity,Display$],[$Ask$,$Elin,$9$:$45,10\mathrm{.}10,800,$Y$],[$Ask$,$Sophia,$9$:$40,10\mathrm{.}06,500,$Y$],[$Ask$,$Will,$9$:$38,10\mathrm{.}05,100,$Y$],[,,,,,],[$Bid$,$Ellen,$9$:$42,10\mathrm{.}03,400,$Y$],[$Bid$,$Ada,$9$:$41,10\mathrm{.}01,300,$Y$],[$Bid$,$David,$9$:$43,9\mathrm{.}98,200,$Y$]]$

Sophie enters an order" $"$ Buy $300$ shares limit $10\mathrm{.}06."$ What executions occur; What are the best bid and offer in the markets?

A$.$ Sophie buys $100$ from Will at $10\mathrm{.}05$ ; Sophie buys $200$ from Sophia at $10\mathrm{.}06$; Now, the best bid and offer in the market are: $10\mathrm{.}03$ bid for $400($Ellen$),300$ offered at $10\mathrm{.}06($Sophia$).$

B$.$ Sophie buys $100$ from Will at $10\mathrm{.}06$; Sophie buys $200$ from Sophia at $10\mathrm{.}06$; Now, the best bid and offer in the market are: $10\mathrm{.}03$ bid for $400($Ellen$),300$ offered at $10\mathrm{.}06($Sophia$).$

C$.$ Sophie buys $100$ from Will at $10\mathrm{.}05$; Sophie buys $200$ from Sophia at $10\mathrm{.}06$; Now, the best bid and offer in the market are: $10\mathrm{.}03$ bid for $400($Ellen$),500$ offered at $10\mathrm{.}06($Sophia$).$

D$.$ Sophie buys $100$ from Will at $10\mathrm{.}05$; Sophie buys $200$ from Sophia at $10\mathrm{.}06$; Now, the best bid and offer in the market are: $10\mathrm{.}06$ bid for $300($Sophie$),300$ offered at $10\mathrm{.}06($Sophia$).$