What is a market economy?
A) Market economy means a rural economy based on farmers' markets.
B) Market economy means that the stock market guides the economy.
C) Market economy is based on agriculture.
D) Market economy is based on what the people want.

d) a constitutional amendment

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

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