B. Supported the right of labor u jobs to strike for higher pay and better working conditions
<span>D. Who led the Visigoths when they invaded Rome?
</span><span>Alaric</span><span>
</span>
213,000 can be rewritten as 2.13*10^5. This tells us that it has has 3 significant digits.
Your correct answer is b. It has three significant figures.