Which MIS aims at facilitating communication and increasing efficiency of managers and office workers through document & message processing?

Office automation system is the modern MIS system which is used for Manager & Worker.

(c) Office automation system is most usefull one.

Because now a days without MIS you can not move as a Manager. Managers' day long works relate to communicative functions along with the continuous communication with clients and global vendors even.

So to be a performer as a Manager MIS must be occupied accurately.

I vote for B & C

(c) Office automation system

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

(c) Office automation system.........................

c) Office automation system

The right option is (c) Office automation system

Although its the office automation system but in my experience investing in a decision support system alongside supports influencers in the company.

Office automation system..............................................

MIS mainly aims at office automation system

I go with office automation ... option c)