阅读下列短文, 从给的四个选项 (a、b、c和d) 中, 选出最佳选项。
体裁：说明文 话题：公民科学 时间：7分钟
citizen science is a term used for projects or ongoing programs of scientific work in which individual volunteers or networks of volunteers，many of whom may have no specific scientific training，perform or manage res
