单选题 It was a type of urban story that continues to ______ big-city dwellers forward each day, a tale of hard work and self-starting initiative, of taking matters into one's own hands to make dreams come true.

【正确答案】 A
【答案解析】propel推动，驱使；penetrate穿透，渗透；baffle为难；harness利用(河流、瀑布等)产生动力。