The answer is most likely "the aztec and olmec"
The answer is A. because it was already tiresome to get 9 nine states out of 13 states to vote on an amendment.
Choice B. is incorrect because the British only required their war costs at the end of the Constitution. Choice C. is incorrect because the Virginia plan (large states) and the New Jersey plan (small states) took place after the Constitution. Choice D. was a major benefit, so that wasn't a weakness.
If you want good sources go to wikipedia and look at the sources used in the wikipedia article. DO NOT USE THE WIKIPEDIA ARTICLE ITSELF AS A SOURCE!
Xkan kamu x kenal die tu Sape,die terkenal kot
