The first question is poorly written, but it looks like it was meant to ask: "What is the default step for a For...Next loop?", though the Null would be a truly strange answer in that case. Since a 'step' would make most sense as the distance you advance with each time through the loop (or the distance you advance with each step), then the answer should be pretty obvious, as well, since two of the options would be no advance at all, while a third answer would be a leap rather than a step.