If a software package is purchased, consider a _____, which offers additional support and assistance from the vendor.​
a. ​request for proposal
b. ​fixed fee model
c. ​supplemental maintenance agreement
d. ​software license

Respuesta :

If a software package is purchased, consider a supplemental maintenance agreement, which offers additional support and assistance from the vendor.

Have you ever bought a new electronic and it comes with a 60 days support from the manufacturer and then once that is up, you have to pay for additional support? That is an example of supplemental maintenance agreement. For a period of time (set by the vendor) you will receive support on your product, 
afterwards, if you would like additional help you will need to register for technical support by paying a service fee.