Most events require the event manager to implement a comprehensive marketing plan. There are also events where very little marketing is needed such as the World Economic Forum $($WEF$).$ Which of the following is the contributing factor that makes the WEF so well attended?

a$.$

A strong organizing committee with access to state leaders, corporate CEOs and top scholars in facilitating meaningful dialogue and collaboration on economic challenges.

b$.$

Focusing solely on economic issues from an academic angle and excluding other sectors$.$

c$.$

Strict exclusivity, limiting invitation and participation to a select few elite VIPs attracting influencers and social media attention.

d$.$

Emphasizing elaborate entertainment to engage participants.