What is the primary source of uncertainty over the limits on presidential power? A.
Some presidents win their elections by greater margins than others.
B.
Constitutional amendments have greatly increased presidential powers.
C.
The constitutional definition of executive powers is broad and unspecific.
D.
Some presidents increase power in times of need.

the answer is b your welcome : )

the answer that best explains what happened to george washington at fort necessity, pennsylvania is : washington was attacked by the french but was able to negotiate with them to peacefully end fighting. the battle took place on july 3, 1754. the battle is considered as being the start of the french and indian war.

a plantation economy is an economy based on agricultural mass production, usually of a few commodity crops grown on large farms called plantations. plantation economies rely on the export of cash crops as a source of income.

i hope this : )