Copper is the correct answer.
A. sent invitations to different people from different fields of study
<span>The sentence A could be a possible challenge because the leader may not be prepared in all the fields of study, putting him at a disadvantage in the panel discussion. It is important that the leader has a knowledge of the topic of the panel because, as a conductor of the discussion, he could ask to correct, synthesize or even simply guide the discussion, where the ignorance of the subject could lead to the spread of false rumors and information.</span>
Answer: its technically just called a dotted half note, but the only thing i could find to possibly help you is a "dotted half note minim ".
Explanation:
Answer: There is a certain way he sets up his lead guitar and rhythm guitar tone on the tone switch.
Explanation: You can mess with the tone switches/volume of one of the options (it varies from model to model, I forget for the les paul), of either lead or rhythm, and switch between them for two different sounds. Try messing around with the tone switches and knobs in each setting and see if you can get a similar sound. Sorry if this answer isn't what you were looking for.