I need a CERR response before 11:59. Please help! It's about "T. H.U. G"

In the play "sorry wrong number"which part of the story can you find heightened tension and suspense?

Iam trying to  get  a call through to san francisco. (send, put)

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.