The 20th Amendment, also called the Lame Duck Amendment, decreased the amount of time between the presidential election and the inaugration of the new president. What were the advancements that allowed for this amendment? must type answer

In the time of George Washington, travel was slow and roads were bad. So the Founders allowed a period of four months between the presidential election and the inauguration. With the improvement of road making and advancement of technology, the Twentieth Amendment shortened this unnecessary wait.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

answer; /// the above statement is (true);