B, C and D are the correct answers hope I can help!
Coal-burning factories and increased automobile usage has caused the greatest increase in "<span>A) air pollution," since in fact coal when burned is one of the worst pollutants. </span>
Yes, it is true that p<span>olitical parties and churches often were not allowed to have a radio station in the 1920s, since it was thought by many that this would be a conflict of interest. </span>
<span>The battle of Leyte Gulf not 100% sure tho :/
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These are the circumstances under which the protest of the students in Tinker v. Des Moines would be deemed unprotected speech:
if their action had clearly threatened order and safety.
And since it didn't, there was no reason for it to be deemed unprotected speech.
