Multi-choice problem: Continue writing the next sentence in this paragraph:

How to use an online fax service
Compare costs and features to find the best internet faxing service for you.
Most services have a monthly fee that covers a set amount of incoming and outgoing faxes. Try to gauge how many faxes you'll be sending or receiving to make sure you don't have to pay heavy overage fees.

Available choices:
[-] Pay attention to how much you currently have to send to ensure the service you're looking at has an unlimited number of servers to work with. If you cannot directly use their server, the service uses a senegal format in which a server remote sends data..
[-] Faxes can be difficult to post at first so we'll be most likely to fall back on standard faxes for instance. Mobile fax services sometimes charge a moderate monthly cost..
[-] Look for added benefits to an internet faxing service. Many plans offer storage of faxes, which is handy if you need to refer back to sent items..
[-] Some providers program paper materials up to technical specifications, while others usually use faxes individually and file a certificate of request. The page that shows up is a good indication that your business is open to faxing..
Look for added benefits to an internet faxing service. Many plans offer storage of faxes, which is handy if you need to refer back to sent items.