jetpack compose navController popBackStack Multiple pages

I have three pages A, B and C, which are accessed sequentially through navigation.

A -> B -> C

How can I return from C to A?

These official descriptions should be useful, but don’t understand.

// Pop everything up to the "home" destination off the back stack before
// navigating to the "friends" destination
navController.navigate(“friends”) {
    popUpTo("home")
}

// Pop everything up to and including the "home" destination off
// the back stack before navigating to the "friends" destination
navController.navigate("friends") {
    popUpTo("home") { inclusive = true }
}

// Navigate to the "search” destination only if we’re not already on
// the "search" destination, avoiding multiple copies on the top of the
// back stack
navController.navigate("search") {
    launchSingleTop = true
}