Olivia Knows That One Person,who Makes All Major Purchase Decisions,dominates

Olivia knows that one person,who makes all major purchase decisions,dominates the firm she is calling on today.Knowing the type of buying center she is calling on will help Olivia to decide:

A) how to approach a particular client.
B) how to deliver pertinent information.
C) to whom to deliver pertinent information.
D) to whom to make the sales presentation.
E) all of these.