I had to guess on this answer because the question was nearly meaningless. When you say that neither the rows nor the columns are fixed, what, exactly, do you mean? Rows aren't fixed by virtue of the variability of the number of them, so making that a part of a question is inherently misleading. Thus the only meaningful portion of the question that remains is the part about columns not being fixed. Any of the answers would be valid for that situation, as there's no supporting detail in the question that would provide sufficient information to make a choice.

Additionally, the answer contradicts the question, so, sorry folks, but this question is a complete and total dud, from which nothing is learned.

Steve

(aka sgmunson)

:w00t::w00t::w00t: