C
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
Which characteristic do single-celled organisms and multicellular organisms have in common?

### Choices:
A. Both have cells with specialized functions for each life process.
B. Both perform all life processes within one cell.
C. Both have a way to get rid of waste materials.
D. Both are able to make food from sunlight.

### Answer:
