Answer:
I think 1 would be ensure and 2 would be citing ... not sure ...
Explanation:
1 and 2 require commas. It then becomes an apposition that explains the subject "everyone" better. Three should be a dot with a capital letter on Y while 4 should be a comma as well to separate clauses.
Fact A is found in passage 2
Hello!
The Germanic language was brought into English by the Angles, Saxons and Jutes.
Hope this helps :)
