The answer to the question given is:
<span>better mass production techniques
</span>Better mass production techniques BEST explains the increased totals for all cars made in the 1920s. Henry Ford, together with <span>General Motors and Chrysler emerging as the “Big Three” auto companies, </span> innovated mass-production techniques that became standard, by the 1920s.
a is the answer (at least that's what i believe)
<span>The government was afraid race relations would be upset because people were already on edge. The Great Depression was hard for everyone. The South was hit hard because they relied on agriculture and prices tanked. They could not get as much money for their crops.</span>
There is a detailed examination of his case at this link
http://www.washingtonhistoryonline.org/leschi/
Ive not read all of it myself but would expect the answer to your question to be there.
Unfortunately the "quashing" of his sentence came far too late to save him from being hung
