Scaled scrum Questions from Nexus Assessment - Sprint length

Hello, I have below question from Nexus Assessment which I really don;t get but i was able to answer correctly after trial and error of the different options

1. There is a question about the two factors that should be most considered when establishing the length of a sprint. the answers are 1. The risk of being disconnected from stakeholders ?????? and 2.The level of uncertainty over the technology to be used

Could someone explain what the answer 1 has to do with it?

Thanks