Which Does "Encoding Specificity Principle" Mean

Which does "encoding specificity principle" mean?

A) The notion that encoding depends on readily accessible information
B) The notion that forgetting depends on the similarities between information available and information forgotten
C) The notion that retrieval depends on the overlap between the information available at retrieval and the information in the memory trace
D) The probability of unsuccessful retrieval
E) The probability of successful retrieval of the distractor item and the information readily available in the memory trace