I would say B) and D) apply to some of the differences between a Prime Minister and a President and also A). In addition, a Prime Minister is head of the government but may not be head of the state which may be a President in the same country or perhaps a Governor General.
Scottish-born Andrew Carnegie<span> (1835-1919) was an American industrialist who amassed a fortune in the </span>steel industry<span> then became a major philanthropist.</span><span>
He gained control because he had the power to take over smaller railroad companies.</span>
The three characteristics of a nation is a population, borders, and recognition from the other nations. For example Taiwan has a border and population but isn't recognised by NATO and the UN so it is still technically part of China. <span />
I think it’s the first option.
The Abolition of Slavery
Bidhya Devi Bhandari
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The first President of Nepal was Ram Baran Yadav. The current president is Bidhya Devi Bhandari, elected in October 2015. She is the first female Nepali head of state. The President is to be formally addressed as "The Right Honourable" (Nepali: सम्माननीय, Sam'mānanīya).