Group A describes results of the California gold rush
It was the "Chinese Exclusion Act" of 1882 that excluded an entire ethnic group from immigrating to the United States, partly because of economic fears but also because of blatant racism.
Explanation:
to avoid persecution in the low countries, especially Friesland and Flanders, seeking religious freedom and exemption from military service.
True.
"Hughes patented the technology in 1909 and, with partner Walter Sharp, formed the Houston-based Sharp-Hughes Tool Company to manufacture the bit. After Sharp died in 1912, Hughes bought his interest in the company. When he in turn passed away in 1924, Howard Jr., an only child whose mother had died two years earlier, inherited the thriving company and became a millionaire."
After shortly returning to Medina, Muhammad fell sick with an illness, that ultimately caused him to die.