Which of the following students best uses "retrograde analysis" to problem solve?

How can congress clarify parts of the constitution that are unclear?

According to the article 13 of the articles of confederation,what percentage of votes by the states was required to ratify any amendments

Katie and her father are looking at the pipes around their house. they find that some of the pipes have rust on them, making them look and feel different than normal pipes. what kind of change have the rusted pipes gone through? a. a physical change b. a vibration change c. a chemical change d. a temperature change