es el conjunto de normas fundamentales de un Estado soberano, las cuales suelen estar expresadas de forma escrita y fijan los límites y las relaciones entre los poderes del Estado
The enlightenment started in 1715 and ended in 1789 so it lasted 74 years
Answer: B. Internet connection speed
Internet speeds vary for many reasons and they won't have an impact on whether a source is credible or not. Instead, you should look at the domain name, the website name, the author, etc to check credibility. You should also get as many sources as you can to back up a claim.
I do think it is Nelson Maldela I hope this helped. I'm not 100% sure but I recognize the name and remember reading about him.