Final answer:
A lead reaching the Program Status of 'success' signifies that the lead has completed a desired action, reflecting a key milestone in the interaction with the marketing or sales program.
Step-by-step explanation:
If a lead reaches the Program Status of "success," this indicates C. The lead performed the desired action as defined by the program channel. This is typically a milestone within a marketing or sales funnel where a lead has completed a certain action that demonstrates their interest or engagement, such as downloading a whitepaper, signing up for a webinar, or making a purchase. The notion of success is defined by the goals and parameters the program has set forth for a lead to meet, which can vary greatly depending on the program's objective.