A student has come up with an algorithm to compress the text of a book using symbols for common words since the book would not normally use symbols. For example, the word the is replaced with ! and the word that is replaces with @. With this in mind, “the black cat that jumped out of the alley” becomes “! black cat @ jumped out of ! alley”.

Which statement below is true about the student’s compression?

1. Correct Answer
   Incorrect Answer
   a

   This is a lossy compression that can be restored back to the original.

2. Correct Answer
   Incorrect Answer
   b

   This is a lossy compression that cannot be restored back to the original.

3. Correct Answer
   Incorrect Answer
   c

   This is a lossless compression that can be restored back to the original.

4. Correct Answer
   Incorrect Answer
   d

   This is a lossless compression that cannot be restored back to the original.