David has inherited a new Adobe Marketo Engage instance. He is doing some investigation and reporting to understand where all the new leads are coming from. He only wants a high-level view of the lead sources -- not a detailed view. He does not want to make any assumptions about the integrity of pre-existing smart campaign logic, etc. He would prefer to use system-managed fields since these are set in a robotic fashion and have no reliance on users.
What two fields would David use for this purpose? (Choose two.)
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