Which of the following describes the way continuity and discontinuity can be employed in the movies?

a$)$ Continuity and discontinuity editing are tendencies along a continuum that can be used whenever the narrative of the film calls for either of them.

b$)$ When continuity editing is used in a movie, discontinuity must also be used.

c$)$ When continuity editing is used in a movie, discontinuity can never also be used.

d$)$ Continuity and discontinuity editing can only be used together in avant$-$