kriti
Reasoning: In the case of archeology and anthropology especially with reference to dating, Deductive Logic, and circumstantial evidence, etc are considered concrete proof and legal tools.
In the given case, the comparison is okay because the ball courts in Mesoamerica are compared with the related latex balls in El Manati and the painting of the players in Son Lorenzo. A can't be faulted for improper comparison.
Reasoning apart, the reason that A is one up over the rest is compliance with the SV number agreement.
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899. While most of the earliest known ball courts in Mesoamerica date to 900–400 b.c., waterlogged latex balls found at El Manati and representations of ballplayers painted on ceramics found at San Lorenzo attest to the fact that the Mesoamerican ballgame was well established by the mid-thirteenth century b.c.
Meaning:
While most of the earliest known ball courts in Mesoamerica date to 900–400 b.c - talking about Ball Courts, in Mesoamerica. While at the beginning suggest we should expect contrast in sentence ahead.
waterlogged latex balls found at El Manati - subject latex balls; verb found
and
representations of ballplayers painted on ceramics found at San Lorenzo
attest : plural subject so plural verb attest seems alright
to the fact that the Mesoamerican ballgame was well established by the mid-thirteenth century b.c. - latex balls and representations of ballplayers attest to some facts.
Error:
Seems alright. Let’s see option choices

(A) waterlogged latex balls found at El Manati and representations of ballplayers painted on ceramics found at San Lorenzo attest

(B) waterlogged latex balls found at El Manati and the painting of representations of ballplayers on ceramics found at San Lorenzo attests
waterlogged latex ball and the painting : plural subject, singular verb: attests
(C) waterlogged latex balls found at El Manati and ceramics painted with representations of ballplayers found at San Lorenzo attests
plural subject : waterlogged latex balls found at El Manati and ceramics painted, singular verb: attests
(D) the finding of waterlogged latex balls at El Manati and the painting of representations of ballplayers plural subject : on ceramics found at San Lorenzo attests
the finding and the painting, singular verb: attests
(E) the finding of waterlogged latex balls at El Manati and of representations of ballplayers painted on ceramics at San Lorenzo attest
singular subject: the finding , plural verb: attest

But in D, "The finding" 'attests', no?
Correct me if i'm wrong.

Thanks.

I don't agree that option E has an SV agreement problem.
The finding of waterlogged latex balls at EL Manati and (the finding) of representations of ballplayers... attest
It is two uncountable noun + uncountable noun , the verb should be plural. right?

If the sentence is The finding of waterlogged latex balls at EL Manati and representations of ballplayers... basically no "of" then it should be "attests"

Can someone explain? Thanks a lot!!