The writer would be better able to know how the event turned out.
Answer: Option C.
Step-by-step explanation:
A person who witnessed an event would always have more details than the news broadcast, this is mainly because the person actually present and witnessed everything that might have happened. For example: if a person witnessed a car accident then he would have a better understanding of how it happened, at what spot it occurred, how many people were in car and so on. Whereas a television broadcast would simply show that a car accident took place. Hence, the writer/person who witnessed an event would be able to known how the event turned out.