Mark wants to compress spreadsheets and PNG image files by using lossless data compression so that he can successfully recover original data whenever required. Which of the following compression techniques will Mark use?

Each correct answer represents a complete solution. Choose two.

A.
Vector quantization

B.
Deflation

C.
Adaptive dictionary algorithm

D.
Color reduction

Explanation:
In order to accomplish the task, Mark should use the following compression techniques:
Adaptive dictionary algorithm
Deflation
Run-length encoding
Entropy encoding

These techniques perform lossless data compression.