Answer:
The correct revision that should be made to correct a vague pronoun is:
1. Change "they" to "she and Dana" in sentence 2.
In the original sentence, "Eliza wished they would have arrived earlier," the pronoun "they" is vague and does not clearly indicate who Eliza is referring to. By changing "they" to "she and Dana," the sentence becomes more specific and eliminates any ambiguity. The revised sentence would be: "Eliza wished she and Dana would have arrived earlier." This revision clarifies that Eliza is referring to herself and Dana in relation to their arrival time.