An online museum is creating a site hosting hundreds of thousands of digital representations

An online museum is creating a site hosting hundreds of thousands of digital representations of art from around the world. The want to use a lossless compression, so that members of the museum can download and decompress the image and have an identical copy of the original file. Which of the following are true? Select two answers.
A. the museum can choose a heuristic approach which will achieve a lossless compression, but they cannot be sure that it is the most efficient compression for each image.
B. the museum can choose a heuristic approach which will achieve lossless compression for most digital representations
C. algorithms for lossless compression exist, so the museum can use those to compress the image
D. the museum should not compress digital representations of art, as there is always a danger that the compression is actual lossy