Answer:
Every day, watches for changes, and dutifully records what happens.
Step-by-step explanation:
The best revision for the given sentence is the last option. It provides a more concise revision of the given sentence. Also, the tense of the verbs in use are all consistent with one another, all in the simple present tense. Lastly, the punctuation in the newly revised sentence is correct and more compact than the use of the extra words "then she". The omission of the extra pronoun gives the sentence a more compact yet complete look.
Thus, the correct answer is the last option.