How should this be accomplished from the campaign keeping the associated campaign member history?

The events manager at dream house realty has a hot lead from a successful open house that needs to become a contact with an associated opportunity.

How should this be accomplished from the campaign keeping the associated campaign member history?
A . Delete the lead and create a new contact and opportunity.
B . Clone the lead and convert the cloned record to a contact.
C . Convert the lead from the campaign member detail page.
D . Add a contact from a campaign member detail page.

Answer: C