Question: What happens to existing content in a sequential access file that is being written into? You can only write into a file with existing data

What happens to existing content in a sequential access file that is being written into?
You can only write into a file with existing data through random-access
You cannot write into a sequential access file with already existing data
The existing content is destroyed
The existing content remains untouched, and any new information is added onto the end of existing data

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