Thinking Critically and Solving Problems In case of an emergency, the receptionist at Leading Edge needs to know who is in the office building,
Therefore, the employees are required to sign in and out when they enter or leave the building. It
was clear during the last two fire drills that many employees are not signing in and out.
Which question demonstrate a systems thinking approach to solving this problem?
A) What incentive would encourage workers to sign in and out?
B)Should employees get docked pay for not signing in and out?
C) Should Leading Edge have a reminder to sign in and out on every door?
D)Why do some workers fail to sign in and out?

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