Given the task definition and input, reply with output. In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

I had just moved into a new home. The house had been empty for quite a few years. As a result, there was a lot of remodeling to do. One of the first things I decided to do was paint the living room walls. The walls were currently painted an ugly yellow and the paint was peeling. I went to the paint store and looked over the paint colors. I settled on a calming blue. I figured out how much paint I would need by calculating the area of the room, then I bought enough gallons to cover the job. I left the store and loaded the paint and supplies I bought into my car. After getting home, I spread a plastic drop cloth over the floor and got the paint ready. I took a brush and dipped it in the paint and spread it over the wall. This was going to look much better!
Question: Did they use a paint brush or roller?
They used a paintbrush