A good summary of an informational text must
include all the details that the text contains about its subject
state in the student's own words only the most important ideas
evaluate whether the text's author covered the subject matter well
use phrases and sentences taken directly from the onginal author
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state, in the student’s own words, only the most important ideas.

Explanation:

to eliminate ambiguous remote or broad reference it is necessary to focus on anaphoric reference. by definition "anaphoric reference means that a word in a text refers back to other ideas in the text for its meaning." the references should be clear and leave no room for ambiguity.

in the first case the pronoun it probably refers to the car but it has not been mentioned before so we should replace it for the car. in doing so the statement becomes clear.

in sentence number   two   the pronoun he refers to charles dickens the author. yet, the first half of the sentence is about the book a tale of two cities. to repair this it would be better to rephrase the first half : after i read   a tale of two cities by dickens, he so as to remove the remote reference.