Use the following information for questions $10-11$

Here are the current quotes at various market venues

Current quotes for a particular stock on various

exchanges:

What is the NBBO?

A$)$ Bid: $$38\mathrm{.}21,$ Ask: $$38\mathrm{.}36$

B$)$ Bid: $$38\mathrm{.}28,$ Ask: $$38\mathrm{.}31$

C$)$ Bid: $$38\mathrm{.}25,$ Ask: $$38\mathrm{.}34$

$11.$ What is the depth at the NBBO?A$)$Bid:$100,$Ask:$1800$B$)$Bid:$3700.$Ask: $4200$C$)$Bid: $300.$Ask: $100$