Full information as to prices, q

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】：句子的主语是full information，information是不可数名词，谓语动词要用单数，故可排除选项A和C；also是副词，应该放在be动词之后，实义动词之前，故选D。