The information about the market for roses enables us to estimate the _______ because _______.

A survey found that when incomes increased by 10​ percent, the following changes in quantities demanded​ occurred: computers up by 12 ​percent, smartphones up by 8 ​percent, and calculators down by 1 percent.

Calculate the income elasticity of demand for computers​, smartphones​, and calculators. For which good is demand income​ elastic? For which good is demand income​ inelastic? Which goods are normal​ goods?
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The income elasticity of demand for computers is ___.
The income elasticity of demand for smartphones is ___.
The income elasticity of demand for calculators is negative ___.

The demand for ____ is income elastic and the demand for ____ is income inelastic.

Choose the correct statement.
A. A computer is an inferior​ good, a smartphone is an inferior​ good, and a calculator is an inferior good.
B. A computer is a normal​ good, a smartphone is a normal​ good, and a calculator is an inferior good.
C. A computer is an inferior​ good, a smartphone is an inferior​ good, and a calculator is a normal good.
D. A computer is a normal​ good, a smartphone is a normal​ good, and a calculator is a normal good.
E. A computer is a normal​ good, a smartphone is an inferior​ good, and a calculator is an inferior good.

In rose​ beds, money blooms
On​ Valentine's Day, Americans bought 257 million roses at about double the normal price. On a normal​ day, 3 million roses are sold.
​Source: The Washington Post​, February​ 10, 2018
Does the information about the market for roses enable us to estimate an​ elasticity, and if​ so, which​ one: the price elasticity of​ demand, the price elasticity of​ supply, an income​ elasticity, or a cross​ elasticity?

The information about the market for roses enables us to estimate the​ _______ because​ _______.
A. cross elasticity of​ demand;
on​ Valentine's Day the demand for roses​ increases, so we can calculate the percentage change in the quantity of roses supplied and the percentage change in the price
B. income elasticity of​ demand;
wealthy people are responsible for the sharp increase in the quantity of roses purchased on​ Valentine's Day
C. price elasticity of​ supply;
on​ Valentine's Day the demand for roses​ increases, so we can calculate the percentage change in the quantity of roses supplied and the percentage change in the price
D. price elasticity of​ supply;
on​ Valentine's Day the supply of roses​ increases, so that the price of roses increases and the quantity of roses supplied increases
E. price elasticity of​ demand;
the news clip tells us how much the quantity of roses demanded changes on​ Valentine's Day when the price of roses rises