$9$a$.$ More and more prospective home buyers and renters $...$

More and more prospective home buyers and renters quickly need assistance from realtors at different times of the day. This is a$($n$)\_\_\_\_\_\_\_\_$ force for change connected to $\_\_\_\_\_\_\_\_.$

Multiple Choice

inside; demographic characteristics

inside; managers$$ behavior

outside; customer and market changes

inside; technological advancements

outside; social and political pressures