Happy to help! We know not to use the S&N rule for this question because you can only use S&N for arguments. This passage is a set of facts.
When determining whether a passage is an argument or a set of facts, make sure to look for S&N indicator words and/or key words such as 'because,' 'therefore,' etc. which indicate that the passage is trying to argue something. If you are still unsure, it can be helpful to try to map out the premise(s) and conclusion(s) of the argument; if there are no premises or conclusions, you are likely reading a set of facts as opposed to an argument.
Hope this helps! Please let us know if you have any further questions.