To ensure efficient and economic use of limited resources in supporting a local area network (LAN) infrastructure, it is advisable to:

A. periodically rotate vendors to obtain the best price-to-performance ratio.
B. standardize on a limited number of device models and software applications.
C. quickly upgrade to the latest hardware and software versions to take advantage of new features.
D. recommend a variety of products so that user effectiveness and flexibility can be maximized.