Patrice has written these instructions for preparing a chemical solution. Select the two cautions or warnings in the instructions. 1. Make sure you are wearing gloves.
2. Select a clean test tube to start.
3. Add 10 drops of fluid A and another 10 drops of fluid B.
4. Shake the test tube slowly and steadily.
5. Add 5 drops of fluid C.
6. Light an acetylene flame, a Bunsen flame, or a lab candle.
7. Hold the test tube over the flame, and rotate it clockwise.
8. Heat the test tube until the solution turns green.

the assumption the narrator makes in this excerpt is that the messages he heards were going to hurt the narrator's mom; the narrator just springs in to action. the narrator doesn't specify in this excerpt why he believes that the messages present a problem that requires protection.

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy