Jones: Prehistoric wooden tools found in South America have been dated

What is Jones' argument?

No similar wooden tools dating to before 13,000 yrs found + takes a long time to migrate from Alaska to SA --> Wooden tools found in SA did not come from people who migrated from Siberia.

However, Smith disagrees with Jones' argument.
He states that the LHS on the argument need not necessarily lead to the RHS. It is possible that such tools decayed over time and hence we can find no evidence of them.

Smith disagrees with the conclusion derived by Jones from the evidence that Jones states. Which answer option talks about this? Only answer option B.

When dealing with point at issue questions, the correct answer option raises a issue on which the speakers have opposing viewpoints.
Any answer option on which both the speakers agree/disagree or on which one of the speakers opinion is not known would be incorrect.

Let us now look at the answer options -
A - we do not know either Smith's or Jones' opinion on this issue. Also, note that the argument is concerned only with tools found in the Americas. Tools found in other continents are not relevant. Also, the argument is concerned only about tools made from wood.
The issue here is whether the wooden tools found in SA came from people who migrated from Siberia. Since, we are not sure whether those people used tools made of other materials or not, this option is irrelevant.
B - Correct answer. Smith agrees with the viewpoint presented in the option. Scientists' attribution of the tools to people from Siberia could be true, according to Smith. Jones, however, does not agree with the scientists' attribution.
C - None of them question its accuracy. Quite possibly, they both agree that the dating is correct.
D - Not the issue that is discussed. The issue discussed is the Jones' conclusion - Wooden tools found in SA did not come from people who migrated from Siberia.
This option talks about something else. Jones only states that if they did migrate from Siberia, they couldn't have migrated more than 13,000 years ago.
We do not know whether Jones agrees that people migrated to Americas from Siberia at all.
" how long ago the peoples who crossed into the American from Siberia to Alaska first did so " - this suggests that Jones agrees that people migrated from Siberia at some point. We cannot infer such a thing from the argument
E - None of them question the accuracy of dating methods used.