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AP Computer Science Principles/Big Idea 2: Data
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Lossless Compression and Data Redundancy

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A lossless compression algorithm is applied to three different files of the same size. The resulting size reduction is 80% for File 1, 20% for File 2, and 5% for File 3. Which conclusion is best supported by this data?

A

File 3 was already in a compressed format

B

Larger files always compress better than smaller ones

C

The algorithm was applied incorrectly to Files 2 and 3

D

File 1 likely contained the most redundant data

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