Brindley had begun on his own account， out of interest， to survey the waterways that he traveled as he went about his engineering projects for mills and mines. （ ?）

Brindley had begun on his own account， out of interest， to survey the waterways that he traveled as he went about his engineering projects for mills and mines. （ ?）
A、布林德雷在为他的磨坊和矿井工程到处奔走的时候，出于自愿和兴趣，对沿途经过的河道进行了勘察。
B、布林德雷由于个人的原因，为磨坊和矿井工程奔走时在兴趣之外已经开始勘察他走过的河道。
C、按布林德雷自己的解释，他在为磨坊和矿井工程奔走的过程中，对于所走过的河道的勘察完全是出于兴趣。
D、在为他的磨坊和矿井工程到处奔走的时候，布林德雷受利益驱动，用自己帐户里的钱勘察了沿途经过的河道。
正确答案：A