This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[Q]: Passage: The term alloy is used to describe a mixture of atoms in which the primary constituent is a metal. The primary metal is called the base, the matrix, or the solvent. The secondary constituents are often called solutes. If there is a mixture of only two types of atoms, not counting impurities, such as a copper-nickel alloy, then it is called a binary alloy. If there are three types of atoms forming the mixture, such as iron, nickel and chromium, then it is called a ternary alloy. An alloy with four constituents is a quaternary alloy, while a five-part alloy is termed a quinary alloy. Because the percentage of each constituent can be varied, with any mixture the entire range of possible variations is called a system. In this respect, all of the various forms of an alloy containing only two constituents, like iron and carbon, is called a binary system, while all of the alloy combinations possible with a ternary alloy, such as alloys of iron, carbon and chromium, is called a ternary system. Question: A five-part alloy is known as?
[A]: ternary alloy


[Q]: Passage: Extensive and diverse public spending is, in itself, inherently at risk of cronyism, kickbacks, and embezzlement. Complicated regulations and arbitrary, unsupervised official conduct exacerbate the problem. This is one argument for privatization and deregulation. Opponents of privatization see the argument as ideological. The argument that corruption necessarily follows from the opportunity is weakened by the existence of countries with low to non-existent corruption but large public sectors, like the Nordic countries. These countries score high on the Ease of Doing Business Index, due to good and often simple regulations, and have rule of law firmly established. Therefore, due to their lack of corruption in the first place, they can run large public sectors without inducing political corruption. Recent evidence that takes both the size of expenditures and regulatory complexity into account has found that high-income democracies with more expansive state sectors do indeed have higher levels of corruption. Question: What countries have big public sectors but low corruption?
[A]: Nordic


[Q]: Passage: To create green sparks, fireworks use barium salts, such as barium chlorate, barium nitrate crystals, or barium chloride, also used for green fireplace logs. Copper salts typically burn blue, but cupric chloride (also known as "campfire blue") can also produce green flames. Green pyrotechnic flares can use a mix ratio 75:25 of boron and potassium nitrate. Smoke can be turned green by a mixture: solvent yellow 33, solvent green 3, lactose, magnesium carbonate plus sodium carbonate added to potassium chlorate. Question: Which copper salt can produce green glames?
[A]:
cupric chloride