Select the definition of little-endian.
A. The most significant byte of a multi-byte datatype is stored at a lower address than the least significant byte.
B. The least significant byte of a multi-byte datatype is stored at a lower address than the most significant byte.
C. The least significant bit of a single-byte datatype is stored at a lower address than the most significant bit.
D. The most significant bit of a single-byte datatype is stored at a lower address than the least significant bit.