Haya Noticed That College Students Needed to Dress Up for Presentations

Haya noticed that college students needed to dress up for presentations but never seemed to have any ties, or at least not very nice ones. She decided she was going to set up a tie store on her campus and offer sports themed ties as well as solid colored ties in her school colors. She can put an announcement on the school's monitors that would display in the dining halls and student union.
Haya knows she needs to manage her relationship with her supplier. Which of the following is true?

A) Haya should invest in EDI software.
B) Haya can use the supplier's intranet to order.
C) Haya should give the supplier access to her VPN.
D) Haya can use the supplier's procurement portal to order merchandise.
E) Haya can use the supplier's extranet to check on her order.