Explain each of the following quotes in terms of course concepts:

A)"Over the years, fundamental changes in the economy, such as demographics and technology, have shifted the Fed's focus to inflation that has run too low."

B)"The situation, Powell said, 'can lead to an unwelcome fall in longer-term inflation expectations, which, in turn, can pull actual inflation even lower, resulting in an adverse cycle of ever-lower inflation and inflation expectations.'"