Which of the following quotes best encompasses a central idea of 20 points
the study's findings? *
A. "Within a very short time both guards and prisoners were settling into their new
roles" (Paragraph 10)
B. "As the prisoners became more submissive, the guards became more
aggressive and assertive" (Paragraph 16)
C. "the roles that people play can shape their behavior and attitudes" (Paragraph
19)
D."Many said they hadn't known this side of them existed or that they were
capable of such things" (Paragraph 21)

The “big dig” the “big dig” (the central artery/tunnel project) has been complex and challenging. located in boston, massachusetts, this tunnel is eight lanes wide and three-and-a-half miles long. what is most amazing about this tunnel is that it is constructed under a major highway and skyscrapers located in boston’s financial district. construction crews used “clamshell excavators” during this dig. these machines carved narrow trenches, and then a special substance was pumped into the trench to keep the dirt from caving in. finally, steel beams were lowered into the trench and concrete was pumped in. one problem that engineers faced while constructing the tunnel is the fact that the soil beneath boston is extremely loose and soggy. engineers solved this dilemma by freezing the soil and pumping very cold water into pipes beneath the city. to strengthen the soil even further, a special type of glue was injected into the ground to with the consolidation of the soil. 23 which phrase best defines the word excavator as used in the passage? a. a device used to measure underground temperatures b. a device used to level uneven surfaces c. a device used to move heavy objects d. a device used to dig holes