Which statement is correct with regards to leads and opportunities?

[answerhappygod]

Which statement is correct with regards to leads and opportunities?

A. Once a lead is converted to an opportunity, you can manually add multiple opportunities to it.
B. Lead to opportunity is a one-to-one relation, hence you cannot have one lead assigned to multiple opportunities.
C. You can have multiple leads associated with a single opportunity but not a single lead associated with multiple opportunities.
D. Once a lead is converted to an opportunity, you cannot associate another opportunity with it.