Answer: Option (a) is correct.
Explanation:
Income elasticity of demand measures the responsiveness of quantity demanded with change in the income level of an individual.

Income of an individual has a positive relationship with the demand for normal goods and has a negative relationship with the demand for inferior goods.
Investments can lead to more demand for goods. Investment means an increase in capital spending and is a component of Aggregate Demand (AD), if there is an increase in investment it will help to boost AD and therefore economic growth.
Answer: AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
The answer to the question above is "the growth of her corpus callosum" which is the reason of Elise's ability to learn which is shown in the question above. The corpus callosum is the part of the brain which related to the intellectual ability of a human. Elise's ability to learn is related to her intellectual ability, thus, the growth of her corpus callosum is the best answer.
Answer: C) $2,000 per week.
Explanation:
The slope of the project refers to the additional amount that it would cost to be able to finish the project faster than schedule.
In the question, the construction activity is for 14 weeks at a rate of $5,000 for the laborers per week. If you wanted to reduce this project duration to 10 weeks, you will have to spend an additional $2,000 more per week.
This $2,000 is therefore the slope of the activity.