英语翻译He left Oxford a young radical dedicated to the service

英语翻译
He left Oxford a young radical dedicated to the service of humanity
还有 下面的哪一个答案填到横线上是正确的：
From the text we can infer that man-made carcinogens are___.
A.no more harmful to the American public than a peanur-butter sandwich
B.not more harmful to the American public than a peanur-butter sandwich
翻译的不准确。