 What best describes how the overall tone changed from the beginning of the article?
When carefully controlled, the radiation stored up in such isotopes was used in many beneficial ways. One reason for asking that particular question was to keep from prying deeper into the subject of the radioisotope. They had been ever since Eddie’s family had moved to Oceanview and his father had become head of the college’s atomic-science department. A slow clicking came through the earphones, but Eddie knew these indicated no more than a normal background count. There were slight traces of radioactivity in almost all earth or rocks. The main information was in the evening Globe , which Eddie rushed out to get as soon as he heard it plop onto the front porch. After having finished, Mr. Taylor handed the paper to Eddie and leaned back thoughtfully in his chair.
 From lighthearted to tense.
 From worrisome to frustrated.  From apathetic to solemn.  From lighthearted to tense.  From upbeat to sympathetic.