Huxley is commenting that most people in society prefer to live in "happy ignorance" as opposed to having knowledge. The stars, or truth, are "depressing."
This is because that many find the truth upsetting and would prefer to live in the dark. Huxley is saying that for many, ignorance is bliss.
In medias res means to start a writing with events that happened in the middle of the story, then continuing the story from the beginning.
The answer is B i just took this test
The word aqueduct comes from the Latin words "Aqua" meaning water and "ducere" meaning to lead. Then it becomes the Latin word "aquae ductus" meaning conduit. Therefore, the meaning of the word aqueduct is a structure that leads water. The correct answer is option B.