Money is at the heart of the conflict.
Explanation:
Eliza (the girl) was insisting to pay for her lessons even though Higgins did not demand it. It was due to the hesitation of Higgins to teach her to speak gently. Eliza deciphered this as Higgins reluctance of not working for free since he must have thought that poor flower girl won’t have enough to pay for his speaking course.
To clear the air regarding the same, Eliza kept insisting for following a professional approach where she would pay for her speaking course.
The most accurate revision of the sentence is the first option: <span>Most students use the Internet to research facts and statistics, to find images to use in papers, and to chat with friends.
This sentence avoids parallelism issues since the grammatical form is consistent throughout the sentence. All the verbs are in the same form (infinitive form) as indicated by the phrases "to research facts and statistics", "to find images to use in papers" and "to chat with friends".
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The other options are incorrect since the phrases in the sentence have inconsistent grammatical forms.
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<span>neither parallel nor at a right angle to a specified or implied line; slanting is either that </span>