The Topic Sentence Below Is Followed by a Brainstormed List

question 21

Multiple Choice

The topic sentence below is followed by a brainstormed list of possible ideas for a paragraph. Decide which ideas support the topic sentence and should be kept and which ideas should be dropped. Select "keep" or "drop" for each idea. Topic sentence: Modern fireworks have their origins in tenth-century Chinese pyrotechnics.
A fireworks shell is a tube made of paper.

• A) Keep
• B) Drop

---

Definitions:

Cross-Price Elasticity

A measure of how the quantity demanded of one good responds to a price change of another good.

Quantity Demanded

The total amount of a good or service that consumers are willing to purchase at a given price.

Cross-Price Elasticity

A measure of the responsiveness of demand for one good to a change in the price of another good, indicating substitutability or complementarity.

Substitutes

Substitutes are alternative products or services that consumers can use in place of another to fulfill the same needs or desires.