9 . I attention to the road when I into a hole in the ground. a . hadn't paid / was falling
b. wasn't paying / fell
c. didn't pay / have fallen
d. hadn't been paying / would fall
e. won't have paid / fallen

b

Explanation:

I wasn't paying attention to the road when I fell into a hole in the ground

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 !

c i took the test and ig: is @yfw.madison

explanation: