Full information as to prices, quality, quantity and other relative particulars（ ）.
A、also are needed
B、also is needed
C、are also needed
D、is also needed
【正确答案】：D
【题目解析】：句子题干中句子的主语是Full information，information是不可数名词，所以谓语动词要用单数形式。整个句子可提炼为Information is needed。