Even though you didn't give us the fragment with the comma slice, it isn't really necessary here as we can answer just based on these 4 options here. All options apart from the second one are correct - only the second option doesn't fix the mistake of the comma splice, whereas the other options do but connecting the sentences properly.
Answer:
Although both Arnetta and Wash wanted segregation to end in Birmingham, they both responded differently to the march. Wash did not participate. He watched from the sidelines, amazed that the marchers would allow themselves to be arrested. Arnetta did join the march. However, unlike Wash, she was disappointed that she had not been arrested.
Explanation:
This was the answer they gave me.
Answer: inaccuracies of other scholars.
Explanation: The artifact thus held the key to solving the riddle of hieroglyphics, a written language that had been “dead” for nearly 2,000 years.
The correct answer is B. 'She's'. When making a contraction, take the two words that you want to make into a contraction and replace at least one letter from the second word with an apostrophe.
She has
In this case, these are the words that we're trying to turn into a contraction. There really isn't any way to explain why we use 'She's' instead of 'She'as', except that 'She's' is the commonly accepted word in the English language.
She's
Now, replace the letters 'h' and 'a' with an apostrophe.
Hope this helps!