Which statement about call centers in the United States is accurate?

Call centers have replaced instant messaging as the technology of choice for resolving the complaints of younger customers.

There has been some shrinkage in the number and size of call centers due to the rise in self$-$service web or speech recognition technologies.

Call$-$center functions have largely been brought back in$-$house from third$-$party companies that specialize in call$-$center operations.

Call$-$center functions have largely been returned to the U$.$S$.$ from countries like India and Mexico.