The correct answer is A. Major Tallmadge developed a unique code system so that the Americans could send secret messages.
Explanation:
To find the central idea in a text, ask yourself what is the main idea the author expresses?. For example, in the passage presented the author focuses on the system Major Tallmadge created and how this system was very elaborated or complex, which is shown through details such as "He substituted digits for words" or "Tallmadge gave his agents a cipher". Moreover, the author implicitly suggests this was used for Americans to send secret messages as he mentions important American military leaders such as "Woodhull, Townsend, and General Washington" and shows how important was that the messages were only understood by few. In this context, the main idea is "Major Tallmadge developed a unique code system so that the Americans could send secret messages".
The bolded pronoun in the given sentence is the word "which". This pronoun is an example of an interrogative pronoun. Interrogative pronouns are pronouns that are used to introduce a question. The antecedents of interrogative pronouns are unknown because it is what is being asked in the sentence that is missing.
Jason Reynolds charmed his audience at the start of his speech at Lesley University Commencement address by making a joke about his hair and the fitting of the head ornament he was using. The central idea of his joke is to validate one of his principles: Insecurities are Healhty.
<em> "Sometimes insecurities and fears can push us towards greatness: to do more and to be more." (Reynolds)</em>
So, the final answer for this question is:
by making a joke about his hair and the fitting of the head ornament he was using.
The right answer is: "The nurse does not know that Nora will leave her children, but the audience does."
When Torvald humiliates Nora, he tries to apologize with her, but she has changed, she realized her husband is a very strange man for her and in her marriage was always a doll, so she decided the only way to recognize herself is leaving from the house.