The correct answer is C.
OBJ-4.4: If you have verified that the source and the target media are both the same size, then a failure has likely occurred due to bad media on the source drive or some bad sectors on the destination drive. The data can always be copied into a RAW format since it is a bit by bit copy and will copy even the source drive’s bad sectors. Even if the source disk were encrypted, the dd program would create a bit by bit copy to the destination drive for later cryptoanalysis attempts. Even if the data were modified, this would not cause the copy to fail. Instead, the copy would continue and record the modified data instead of the original data.