Where is it most likely to be slippery?

The choice that indicates "All of the above" encompasses several different conditions where roadways can become slippery.

At the bottom of a hill, vehicles may gather water or ice from precipitation accumulating at lower elevations, especially during rainy or wintry conditions. This area can be particularly hazardous as drivers may not anticipate a change in traction when traversing downhill.

On bridges, the road surface is exposed to air from both above and below, making them more susceptible to ice formation even when roadways are clear. The temperature can drop quickly on a bridge, leading to icy conditions that can catch drivers off guard.

Intersections can also be slippery due to the frequent stopping and starting of vehicles. Oil and debris can accumulate at these points, especially after rain, creating slick patches that may not be immediately visible to approaching drivers.

Since each of these locations can present unique challenges and hazardous conditions under certain circumstances, the correct answer reflects an understanding that all these areas are potential risks for slippery surfaces, emphasizing the need for heightened awareness when driving in these situations.