Correct Answer: B. an increase in income

Explanation

A shift in demand means that at any price (and at every price), the quantity demanded will be different than it was before. It caused by a change in the number of consumers, a change in the distribution of tastes among consumers, a change in the distribution of income among consumers with different tastes. Price does not affect the shift of a demand curve. From the given options, B correctly fits into this narrative.

Correct Answer: B. Philip

Correct Answer: A. an inverted population pyramid

Correct Answer: D. a shortened

Correct Answer: C. Hydrochloric acid

Correct Answer: C) rickets

Explanation

Vitamin D is an important nutrient that our body needs to stay healthy. If we don't get enough vitamin D, we may develop certain health problems. This question is asking about the deficiency of vitamin D and what health problem it can cause. The options are scurvy, pellagra, rickets, beriberi, and polio. Out of these options, the correct answer is rickets. Rickets is a condition that affects the bones, making them weak and soft. It is caused by a lack of vitamin D, which is needed for the body to absorb calcium and build strong bones. To prevent rickets and other health problems caused by vitamin D deficiency, it is important to get enough vitamin D from our diet or from sunlight. Foods that are rich in vitamin D include fatty fish, egg yolks, and fortified milk and cereal. Spending time outside in the sun can also help our body produce vitamin D. In summary, the deficiency of vitamin D can lead to health problems, including rickets which affects our bones. To prevent such problems, we should ensure we get enough vitamin D from our diet and/or sunlight.

Correct Answer: A. the market size

Correct Answer: D. Yobe

Correct Answer: C. loyalty scheme

Explanation

A form of sales promotion that rewards customers for consistently purchasing a company's product is a loyalty scheme. A loyalty scheme, also known as a customer loyalty program or rewards program, is designed to incentivize and reward customers for their continued loyalty and repeated purchases. Customers who participate in a loyalty scheme earn points, rewards, or other benefits based on their purchases or other predefined criteria. These rewards can include discounts, free products, exclusive offers, access to special events, or other incentives. By implementing a loyalty scheme, businesses aim to foster customer loyalty, increase customer retention, and encourage repeat purchases, ultimately strengthening the relationship between the customer and the company.

Correct Answer: A. Level: river