So Ive been searching for a job for the past few months and finally got some interviews. I interviewed for a job at a online company last Tuesday and then another job at a business development firm last Friday. Today i was offered the position at the business development firm but as a temp without benefits. I would like to be working at the online company because the position would suit me better and seems like a better place to work. I haven't found out the status of the position at the online firm yet; tho they said they would get back to me within this week. how should i "buy some time" or go about find out if im still in consideration at the online company first before accepting the offer.

cliffs:
-was offered at position in Company A but would rather work for Company B
-havent found out the status of Company B yet
-have one day to accept the offer from Company A