The answer is C) The country had a low population density and lacked any defense system.
The ease with which European imperialists conquered China was due to its sparse population and absence of defense mechanisms.
During that time, China did not possess a formal or adequately trained military.
These aspects made it easier for invaders to penetrate Chinese lands, despite the challenging geography which included mountainous regions that had kept China isolated for many years. The Mongols invaded and controlled significant parts of China in the 1120s AD, and another instance of invasion was the Japanese occupation between 1937 and 1945.
I was the initial explorer to chart the quickest maritime route to the Far East.
Rockefeller showed great confidence throughout his life. Beginning as a bookkeeper, he took a risk by investing all his savings ($800) at the age of twenty to form a partnership with Maurice B. Clark. He again ventured into the unknown by founding the Standard Oil Company in 1870. Rockefeller summarized his experiences with this reflection:
I was taught early on to work as well as play,[ [TAG_5]]
My existence has been a prolonged, joyful holiday;
Filled with labor and leisure—
I discarded my worries along the way—
And I was blessed by God each day.
Rockefeller's carefree outlook and sense of luck illustrate his substantial confidence in his endeavors.