Which statement best explains a difference between a character vs. self conflict and a character vs. character conflict?

A character vs. self conflict is an internal conflict, while a character vs. character conflict is an external conflict.
A character vs. self conflict can only be inferred by the reader, while a character vs. character conflict is always explained to the reader.
A character vs. self conflict occurs only during or after the climax, while a character vs. character conflict can occur anywhere in the plot.
A character vs. self conflict is not outwardly expressed by the character, while a character vs. character conflict is.