Which of these is not a way of maintaining open communication?
a. invite coworkers to lunch to discuss issues
b. say hello to everyone you see in a day
c. regularly check in to see progress on a project
d. talk only to managers for status reports

The one that would not be considered as a proper way to maintain open communication is: D. Talk only to managers for status reports

Status reports Capture all critical aspects of the project that currently held by the companies.  This report would show how much the companies have progress in completing the project and potential problems that the company might face in the future. If managers want to maintain open communication, they need to reveal information in status report to all employees.

the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.