A Freelance Computer Consultant Keeps a Database of Her Clients $N = \{ \text { Hilbert, Crafts, Effigy, Global } \}$

Multiple Choice

A freelance computer consultant keeps a database of her clients, which contains the names
S = {Acme, Brothers, Crafts, Dion, Effigy, Floyd, Global, Hilbert}.

The following clients owe her money:
$N = \{ \text { Hilbert, Crafts, Effigy, Global } \}$
The following clients have done at least $10,000 worth of business with her:
$B = \{ \text { Hilbert, Brothers, Crafts, Dion } \}$
Find the clients who owe her money and have done at least $10,000 worth of business with her.

A) $\text { \{Hilbert, Crafts\} }$
B) $\text { \{Hilbert, Crafts, Effigy, Global, Brothers, Dion\} }$
C) $\text { \{Hilbert, Effigy, Crafts\} }$
D) $\text { \{Hilbert, Crafts, Dion\} }$
E) $\{ \text { Crafts, Brothers } \}$