Which cine film sizes are commonly available?

The correct choice indicates that 16 mm cine film sizes are commonly available. This size has been widely used in both amateur and professional filmmaking due to its manageable cost and ease of use. It strikes a balance between image quality and film cost, making it a popular choice for various applications, such as educational films, documentaries, and short films.

In contrast, while 35 mm is also a standard film size used for professional cinema, it is the 16 mm that is particularly notable for accessibility and versatility in lower-budget productions. The 30 mm size is not a standard size recognized in the cine film category, making it less relevant in this context. The 120 mm film, commonly used for still photography, does not fall into the cine film category. Thus, the focus on 16 mm highlights its established role in the film industry and its availability for filmmakers.