What impact does the national and international markets have on oil in texas?

The Texas oil boom, sometimes called the gusher age, was a period of dramatic change and economic growth in the U.S. state of Texas during the early 20th century that began with the discovery of a large petroleum reserve near Beaumont, Texas. The find was unprecedented in its size and ushered in an age of rapid regional development and industrialization that has few parallels in U.S. history. Texas quickly became one of the leading oil producing states in the U.S., along with Oklahoma and California; soon the nation overtook the Russian Empire as the top producer of petroleum. By 1940 Texas had come to dominate U.S. production. Some historians even define the beginning of the world's Oil Age as the beginning of this era in Texas.[1]
The major petroleum strikes that began the rapid growth in petroleum exploration and speculation occurred in Southeast Texas, but soon reserves were found across Texas and wells were constructed in North Texas, East Texas, and the Permian Basin in West Texas. Although limited reserves of oil had been struck during the 19th century, the strike at Spindletop near Beaumont in 1901 gained national attention, spurring exploration and development that continued through the 1920s and beyond. Spindletop and the Joiner strike in East Texas, at the outset of the Great Depression, were the key strikes that launched this era of change in the state

A.

Explanation:

The ancient Chinese civilization was protected from invasion and cultural diffusion because of the geographical isolation. The ancient Chinese civilization was isolated by desert from the north and west, and the Pacific Ocean to the east.  

The settlements along the Huang He river were not affected by cultural diffusion because they were isolated by the Gobi desert to the north, which kept people from invading the land.

Therefore, option A is correct.