D The xylophone is a percussion instrument whose name comes from the Greek xylon, meaning "wood."
I Want to say Furthermore. They use "Furthermore" to add additional information and in your case you are not doing so. And simply has nothing with to do with the cause and effect organizing principles.
They both describe healthy habits and things you should do in order to be healthy.
I believe the answer to question two is true. Political writings were usually persuasive.
Hope I helped!