What is the difference between a coding system and a coding frame?

What is the difference between a coding system and a coding frame?
A) A coding system explains how to make systematic observations, while a coding frame lists all of the possible values a code can take
B) A coding system is a class of software used to code text data, while a coding frame is a list of possible codes
C) A coding system explains how to select cases for content analysis, while a coding frame lists all of the possible cases in the population
D) A coding frame explains how to select cases for content analysis, while a coding frame lists all of the cases that have been sampled
E) A coding system outlines the procedures for manifest coding, while a coding frame outlines the procedures for latent coding