Which BEST describes how a parliamentary democracy is different from a presidential democracy?

A.
In a presidential democracy, there are usually two main political parties; in the parliamentary system there is only one.

B.
In a parliamentary democracy there are usually two main political parties; in the presidential system there is only one.

C.
In a parliamentary democracy, the head of the government is elected by the legislature.

D.
In a presidential democracy, the head of the government is elected by the legislature.

Is karma the same as destiny, in the sense that everything that happens to you is predetermined? do you believe that "what goes around comes around," and if so is this the same as karma? does everyone get what they deserve, in the end?

“[the city’s engineers excelled in areas] neglected by the greeks, such as the construction of roads and aqueducts, and of sewers that could wash the filth of the city into the tiber. they have built paved roads throughout the country, leveling ridges and filling up hollows, so as to make possible the movements of heavily loaded wagons. . and such is the quantity of water brought in by the aqueducts, that veritable rivers flow through the city and its sewers: almost every house has cisterns, waterpipes, and copious fountains.” —strabo, as quoted in empires ascendant: time frame 400 b. c.–a. d. 200 cisterns are tanks that hold water until it is needed; if a house has a cistern, it is likely to also have a. aqueducts. c. a swimming pool. b. a fish pond. d. sinks and faucets.

How does the balance of trade look different in the us today vs hot it looked in the 70's