An explanation would help thanks!

Researchers conducted a survey on a random sample of 750 grade 11 students in Orangetown who were learning online due to the Covid-19 pandemic; 37% said they spend more than 2 hours on their homework each day. The margin of error for this survey was 4.101%. Find the approximate confidence level used by the researchers. Select one: 95% 98% 80% 90% 99%