The answer you're looking for is <span>27.
</span><span>27 were ratified by the states.</span>
"C. <span>With a lot of daily practice" would be the only option from the list that is a sentence fragment, since there is no subject and it is unclear what exactly is being referred to. </span>
The cause of the Great Depression is when the stock market crashed in 1929 which sent Wall Street into a panic and wiped out millions of investors.