Of the 9500 drivers () since the beginning of the year, 23% were found () in road knowledge.

A. tested lacking

B. having been tested to lack

C. tested lacked

D. to have been tested lack

近年来，我国经济持续高速增长，资源问题凸现，出现了电荒、水荒、煤荒、油荒、地荒……上述材料表明（   ）

①事物都是运动变化的 ②矛盾是普遍的又是客观的 ③主要矛盾与次要矛盾是相互转化的 ④量的积累达到一定程度必然引起质变

A．①②③

B．②③④

C．①②④

D．①②