What made you decide to leave ABC Corporation?

"I worked at ABC for five years. I learned a lot about the automotive industry, and I learned - I won't say I learned everything about my job function, but I learned enough to be highly proficient at it. I would like to take on a different challenge, and while I did ask the question, it didn't look like there were any opportunities to change job functions at ABC in the foreseeable future, so I decided to look elsewhere. Here I am. I want to work on more than just one component of an emissions system. I want to be a part of making the whole thing work. I want to broaden my base of knowledge. I find that challenging, and I think it makes me more valuable to the company I work for"