Hurry pls! 20 points

Which of the following is most indicative of a change of tone in the chapter
entitled "The Reservoir Shack: An Aside?"

A) "My brother-in-law was foreman of a reservoir maintenance detail..."

B) “A flashlight was blinding him. He felt the sharp jut of a gunsight
against his cheek."

C) "Each crew spent twenty-four hours on standby, making periodic
checks..."

D) "They drove out there, checked the chlorine shed, toured the
perimeter..."​