Why should abrupt shifts in writing be avoided?

Question

Responses

They are confusing and can make writing or a conversation difficult to follow.
They are confusing and can make writing or a conversation difficult to follow.

They are difficult to correct.
They are difficult to correct.

They convey the attitudes and ideas expressed in the sentence.
They convey the attitudes and ideas expressed in the sentence.

They create consistency in voice.

Answer 1

They disrupt the flow of the writing and can distract the reader from the main message.