<span>The 19th century was a period of great change and rapid industrialization. The iron and steel industry spawned new construction materials, the railroads connected the country and the discovery of oil provided a new source of fuel. The discovery of the Spindletop geyser in 1901 drove huge growth in the oil industry. Within a year, more than 1,500 oil companies had been chartered, and oil became the dominant fuel of the 20th century and an integral part of the American economy.</span>
Answer:
It is a conditional statement that can be written as "If a quadrilateral has exactly one pair of parallel opposite sides,
then it is a trapezoid."
The hypothesis is: a quadrilateral having exactly one pair of parallel opposite sides.
The conclusion is: it is a trapezoid.
Explanation:
The quadrilateral contains 4 slides and the sum of all the internal angles is 360°
Moreover, the quadrilateral has exactly one pair of parallel opposite sides Then we called as a trapezoid
It is a condition plus hypothesis and the conclusion
hence, the first, second and last options are correct
Therefore All the other options are wrong
You didn't include options but here's the jist - there were many casualties, cities and towns were left in ruins, national identities across Europe were in shambles.
