Adding filters to a view in Google Analytics allows you to
- exclude visits from a particular IP address
- replace complicated page URLs with readable text strings
- modify historical data
- A and B only
- A, B, and C
Explanation: Filters allow you to limit and modify the data that is included in a view. For example, you can use filters to exclude traffic from particular IP addresses, focus on a specific subdomain or directory, or convert dynamic page URLs into readable text strings.
Read more here: https://support.google.com/analytics/answer/1033162?hl=en