Which sentence expresses the ideas completely without any unnecessary words or​ phrases?
a. coffee​ drinking, in the final​ analysis, not only increases productivity but as a matter of fact it is also good for your health.
b. coffee drinking not only increases productivity but is also good for your​ health, according to several recent objective scientific studies.
c. coffee​ drinking, in the final​ analysis, not only increases productivity but in a very real way it also improves​ health, too.
d. coffee​ drinking, in the final​ analysis, not only increases productivity but is also good for your health for all intents and purposes?