Arnold is no longer a cleared DoD employee, and he is now writing a military spy thriller novel. Arnold is including information and events in his book that he has experienced throughout his DoD career. Does Arnold have to submit his book for a prepublication review before submitting his book for publication?

Yes, Arnold needs to submit his book for pre-publication review before publication. This is because, before he started working for DoD, he must have signed some Non-Disclosure agreements not to discuss some informations or technologies which he came across in the organization.

The pre-publication review would help to ensure that, there is no sensitive information about DoD which he put in his book for public consumption.

Explanation:

there is 2 main differences, basically which are the users and the market. the other difference is the kind of content

people who use tik tok are mainly people from east asia, kind of like the app douyin. musically, on the other hand, are used by people from america or european countries.

while tik tok videos show things like daily life videos, comedy, or just funny videos, musically are like people mimicking songs with their own actions, 'imitate' singers and video clips.

hope this !

your answer would be: d) eye contact