Write the next sentence in the following story.

How to hire a tree trimmer
Call local tree trimmers listed in the phone book or found online.
Set up appointments with them to get price estimates for your job and ask for references to their previous work.
Talk to these past clients and ask if you can see what kind of tree maintenance they received.

Available choices: a). Find out their impressions of the service you are considering. Ask your family, friends, and neighbors which tree-trimming service they use or can recommend to you. b). Ask locals to identify what tree trimmers are the best for the job or these local trees are a complete loss. Check the business's twitter and facebook accounts for information about tree trimmers. c). You might be able to make a discounted offer in return for their services or discounts on work that they had not done. Talk to third party companies offering tree trimmer jobs looking for 1-2 years. d). Oftentimes tree trimmers are hired to provide grammatical improvements rather than bribing fees and increasing prices for the less expensive branch trimmers. During meetings ask if they used a free or paid tree trimmer for earlier jobs.. The answer should be
a).