When using data communications with 8-bit codes, the number of alphabetic symbols:
a) must be exactly 256
b) must be greater than 8
c) can be greater than 1024 bytes
d) must be less than 256
e) determines the number of octets
8-bit code implies 2^8 or 256 symbols, so the correct choice would be (a).
Note that ...
The expert examines 8-bit data communications.