【正确答案】 C

【答案解析】[解析] 推理判断题。本题是问奥运会从什么时候开始有规律地每四年举行一次。根据文章最后一段第一句话It was not until 1896 that the first Olympics of modern times were held in Athens．From then on the games are held every four years regularly．可知，直到1896年第一届现代奥运会才在雅典举行，从那时起奥运会开始每四年举行一次，因此本题答案为[C] from 1896。