问题详情

Politicians and pollsters alike warn that the outcome of a presidential race remains ______until Election Day itself, and many races depend on factors that run from bad weather______voter turnout to last-minute scandals.
A．unknown… abetting
B．unlikely… decreasing
C．fluid… affecting
D．predetermined … consolidating
E．fixed… absorbing请帮忙给出正确答案和分析，谢谢！