Sean Is Thinking About Creating an Automatic Cat Feeder Similar

Multiple Choice

Sean is thinking about creating an automatic cat feeder similar to one that he created for dogs.He talks to several cat owners to find out what they dislike about feeding their cats.He also takes a look at current cat feeders and asks the same cat owners what they like and don't like about the feeders.These actions consist of asking questions and what other step in scientific experimentation?

A) a pilot study
B) hypothesis testing
C) background research
D) prototyping