The global workplace refers to

A. taking classes in a foreign language.

B. learning how to deal with clients and customers from other countries.

C. handling the process of sending international mail.

D. understanding the development of e-mail

The Global Workplace does not have to do with emails or mail: it's much more than this. It refers to the fact that the workplace is the whole world, not only one country.

It does mean speaking a foreign language, but not always, and it also means more than this.

The correct answer is the remaining one: B. learning how to deal with clients and customers from other countries.