I understand NITAAC sends my requirements to contract holders only for the task areas I specify. If I select task areas (1),(2),(3),(4), and (5), can a contract holder with only (1) and (5) still send a quote?

Question: 
I understand NITAAC sends my requirements to contract holders only for the task areas I specify. If I select task areas (1),(2),(3),(4), and (5), can a contract holder with only (1) and (5) still send a quote?

No. NITAAC only sends your requirements package to contract holders who were awarded contracts in ALL of the task areas defined in your requirement. NITAAC automatically excludes those contract holders who are not qualified to submit proposals for your requirement.