In _______ arrangement, the horizontal supports are given two adjacent parallel walls which have become unsafe due to the removal or collapse of the intermediate building.

Correct option is A

Flying shores are used when two adjacent parallel walls become unsafe due to the removal or collapse of the intermediate building. In this arrangement, horizontal supports (called shores) are provided to support the walls and prevent them from collapsing. Flying shores are commonly used in construction or demolition work to temporarily stabilize structures when an intermediate support is missing.