The correct answer is: A large computer designed to handle complex scientific calculations may use only a firmed word-length storage approach.
A large computer designed to handle complex scientific calculations will likely require a large amount of storage space. A fixed word-length storage approach would allow for more efficient use of storage space, as each word would be the same size. This would make it easier to access and manipulate data.
A character addressable storage unit would allow for each character to be stored in a separate location. This would be more flexible than a fixed word-length storage approach, but it would also require more storage space.
A fixed length word of four characters each would be inefficient for storing scientific data, as most scientific data is not composed of four-character words.
A computer that does not use numbered address locations would be difficult to program and debug.
Therefore, the correct answer is: A large computer designed to handle complex scientific calculations may use only a firmed word-length storage approach.