♥ The Plow invention increased crop yields and made soil more porous
E is the answer. It is a hurricane which causes Droughts (temperature spikes), and floods.
As I recall it was rolled-steel girders riveted together, probably from shipbuilding, together with steam-powered winches and an abundance of cheap steel. As opposed to European cathedrals erected with animal-powered winches and with more expensive forged iron bracing (one of the big cathedrals has a kind or iron corset to keep the walls from bursting outwards).
B I think sorry if it’s wrong
