When collecting data for a high school class project, Alex sent out a survey asking students how much they spent on music over the past month. Before analyzing the data, Alex needs to clean it up. Which of the following would NOT be a valid step in cleaning up the data?

1. Correct Answer
   Incorrect Answer
   a

   Removing any qualitative values, such as “Too much”.

2. Correct Answer
   Incorrect Answer
   b

   Removing any survey that just wrote zero for their monthly spend.

3. Correct Answer
   Incorrect Answer
   c

   Removing any survey that left the question blank

4. Correct Answer
   Incorrect Answer
   d

   Translating any written number such as eleven into digits such as 11.