Final answer:
The most suitable file type for a billboard image is presumed to be SVG (Scalable Vector Graphics), which could be a typo in the options provided as SVC. Vector graphics are scalable without quality loss, unlike JPG, BMP, or GIF, making them the best choice for large format printing.
Step-by-step explanation:
The best choice of file type for an image that will be made into a billboard is SVC. However, it seems there may be a typo in the options provided, as the more common vector format used for large scale printing like billboards is SVG (Scalable Vector Graphics). Vector formats are ideal for billboards because they can be scaled to very large sizes without losing quality.
Unlike pixel-based images such as JPG, BMP, and GIF, vector images are composed of paths, which are scalable to any size without pixelation. If SVC was a typo and the option was intended to be SVG, then it's the correct choice. If not, none of the listed options are ideal for billboard printing, and a vector format like SVG should be used instead.