A. Listening
You have to listen to communicate, whether its with your ears or eyes. The others are not necessary for communication
Past tense
(You can tell it's past tense because it has the word HAD in it. It means it's already been done.)
If it were present tense, it would say "Being coached", and if it were future tense it would say "Will be coaching."
Hope this helps! :)
The coordinating conjunctions among these are and and so.
However and therefore are not - they are subordinating.