问题详情

"They vault over technical fixes as fast as the hurdles are erected"(Para. 1)probably means that hackers
A．are constantly trying to overcome technical problems.
B．immediately find a way to break into others" computers.
C．get excited to fix technical problems they have faced.
D．tend to install technical barriers in others" computers.请帮忙给出正确答案和分析，谢谢！