Recently I bought a secondhand car, ________ was very low．
A.which priceB.the price of whoseC.its priceD.whose price在线课程D
解析：
句中无and，非并列句不能选C项；
B项有错误，应用the price of which；
定语从句中引导词作定语，用whose为宜．whose既可指人，也可指物(此处指“二手车的”)．