Answer: Face-to-face meetings
Explanation:
Face-to-face meetings are the gathering for formal discussion and communication between members of organization in in-person manner. It help in improvement of efficiency and proper making of decision instead of sending mails to each other.
According to the question,face-to-face meetings should be used by employee to know each other as in-person and develop communication and understand in with each other.They can then discuss about developing product.
Other options are incorrect because joint meeting are not the meeting mechanism which helps in knowing each other personally and increasing efficiency of work .Thus, the correct option is face-to-face meetings.
