Filter Logcat Messages

Filter logcat messages. If in the filter menu, a filter option "Show only selected application"? means

A) Display the messages produced by the app code only (the default) . Logcat filters the log messages using the PID of the active app.
B) Apply no filters. Logcat displays all log messages from the device, regardless of which process you selected.
C) Create or modify a custom filter. For example, you could create a filter to view log messages from two apps at the same time.