Here's the analysis:
* "What was said about the program" acts as the subject of the sentence. It's what the sentence is about.
* "was said" is the verb of the sentence.
* "about the program" is a prepositional phrase modifying the verb "was said."
Therefore, "what was said" is the direct object of the verb "was said." It's not a complement of the preposition "about."
The word "said" is a transitive verb, meaning it takes a direct object. "What" is the direct object, representing the thing that was said.
The entire phrase "what was said about the program" functions as the subject of the sentence.
Let me know if you'd like to explore more about subjects, direct objects, or prepositional phrases!