Which of these was not a weakness of the articles of confederation? a) no executive b) one vote per state c) majority vote required d) no power to tax

I believe the answer is: C. majority vote required

The problems of the articles of   consideration exist on the total number of votes that would be given to each states. Some advocate that all the states should have equal number of votes while the other advocate that they need to consider states' size and population into the number of votes.