The biggest engineering project that they undertook was encumbered by lack of funds.
【正确答案】 C
【答案解析】解析：句意：他们承担的最大规模的工程项目受到了资金缺乏的阻碍。encumber阻碍。ham—per妨碍，牵制。cancel取消，删去。condense浓缩。haunt神鬼出没。