Tan from the excerpt is able to build the central idea in that she relates her mum's English as evidence that one's mother tongue or the language of one's upbringing is a deep form of expression.
<h3>What is a central idea?</h3>
A central idea is an idea in a text around which all the other elements of the story revolve.
Thus, it is right to state that Tan from the excerpt is able to build the central idea in that she relates her mum's English as evidence that one's mother tongue or the language of one's upbringing is a deep form of expression.
Learn more bout central ideas at:
brainly.com/question/2684713
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Papa glanced over toward the crowd, "Why that’s President Arthur himself!" he exclaimed is the sentence from the story best supports the idea that the event was of national importance.
Option B
<h3><u>Explanation: </u></h3>
Chester A. Arthur was the 
president of the United States. When a President visits any monument and inaugurates it definitely it becomes the historic moment. It is clear from the story that President Chester A. Arthur has visited the Brooklyn Bridge when it was made, his visit has increased the popularity of the Brooklyn Bridge.
Surely it has become a historic and national event for the country and for the people. From the above line, it is clear that this sentence denoted the historical event of the opening of the Brooklyn Bridge.
