hich statement$($s$)$ about electronic data interchange $($EDI$)$ are$/$is true?

a$.$

When it uses the Internet and Web protocols, the cost of transmitting documents lowers.

b$.$

It uses proprietary protocols and networks.

c$.$

When Web$-$based EDI is used, the process of sales forecasting is disrupted.

d$.$

It is more beneficial when there are more companies in its network.