A training courses
B website designers
C conference venues
D security systems
E promotional packages
F after-dinner speakers
G pension schemes
H transportation systems _________

A．These companies operate differently under state laws.
B．These companies charged lower than pawnbrokers.
C．Most of the loans made by these companies have no guarantee.
D．Customers must repay the loans in installment.

A．figure
B．gap
C．edge
D．average