What is the first step in recording an impression?
a. making a cast of the impression
b. testing to see whether the tool fits into the mark
c. taking a photograph
d. taking the entire impression to the lab

Which of the following was a social cost associated with the development of the internal combustion engine used in most cars? a. people were able to use their horses for new tasks. b. new jobs were created. c. blacksmiths needed to gain new skills to continue working. d. families were able to travel farther more easily.