It is a 1 syllable word :)
Answer:
A) Join or form a project discussion group
C) Attend a web conference with project team members
D) Use a video tool to have face-to-face discussion over the internet
Explanation:
b) Write in your personal online diary. (This has nothing to do with collaborate with peers)
d) Take another student’s assignment and add your name. (This has nothing to do with collaborate with peers)
The clause <em>when we can rest </em>is a subordinate/dependent clause, meaning that it cannot stand on its own - it has to be a part of a larger, independent clause, as is the case here.