The key answer of exercise 1c
The key to exercise solutions in chapter 5.1 - Who holds the power? for the textbook Navigate Advanced C1 - Workbook with authors Julie Moore from Oxford University Press
Question
Which of the relative pronouns in exercise 1b can be omitted
Answer
1) Number 7: in which can be omitted without any text changes.
2) The following can be omitted with some changes to the text:
1) ... especially the press, seen to have a significant influence on....
2) It's a term thought to have been used by Edmund Burke...
6) This prediction has arguably proved...
9) In an age when almost anyone with an internet connection can...
10) These individuals, now reaching many millions...