Hi,
Based on the recent trend with VSC. If you Company is an Consulting Services,
1. EER (Employer Employee Relationship) of 5 Pages. Don't worry about it. - Most possible one.
or
2. SOW or Contract Agreement between your Current Employer and Client.
or
3. Any thing related to Fee (There was Fee hike this year for Non-Imm petitions).
or
4. Previous Employer(s) (Pay stubs, W2, LCA, I-797C or I-129 ...etc) which you would have submitted while filling your petition. USCIS officer might want it again.
These are the most frequently asked RFE in Vermont. All the best.
(If Consulting) Make sure you get Client Letter(with/out Contract duration, No if Contract is ending within month or so, else No end date should be fine). Also If Client is not willing to give Letter, then take copy of Email thread between you & manager stating reason for not giving the letter and Letter from you Colleague with his contract details [Role, Email, Phone(work)] should be fine.
Hope this help's. Good Luck.