Annie has been designing a new pool filter for pools of over 5,000 gallons. The prototype she designed works well, but only on pools of less than 3,000 gallons. Which statement explains why Annie is not frustrated?

Engineers still need to design filters for smaller pools, this prototype can be distributed to other clients.

Engineers can always take an existing idea and expand on it.

Engineers will not allow failures to stop them; a previous failure can be a practical solution for a new problem.

Engineers work in a cyclical process, she can just begin a totally new project