It is because she is too inexperienced ______ she does not know how to deal with the situation.
【正确答案】 B
【答案解析】本题测试强调句型：It's...that／who...，当被强调部分为“人”时，用who；当强调除“人”以外的事物时，一律用that。题中强调的部分是because she is too inexperienced。