One of the answers that could fit in the blank is better.
Hope this clarifies your doubt.
Answer:
B. She served as president for 23 years before resigning amidst claims that money was being mishandled internally.
Explanation:
For this question, you want an answer that is targeting Clara as its main point. The other answers (A, C, and D) are all incorrect because they are talking about topics unrelated to Clara, such as the Civil War, American Red Cross, etc. Thus, your best option is B.
I hope this helps you a bit! If you need any more help with this topic feel free to message me!
<span>The participial phrase barking in the yard modifies dog.
Ex: The kitten, sleeping peacefully on the window sill, never heard us enter the room.
Ex 2: Enchanted and enthralled, I stopped her constantly for details.
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</span>