How tall was the black cloud (dust) Oklahoma, on June 4, 1937.

Estimated at 4000 feet.

Explanation:

The dust bowl clouds averaged about 2,500-6000 feet.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.