Seeing the colored traffic lights at an intersection as festival or holiday decorations rather than a warning of impending danger is a symptom of
a. narcotics.
b. hallucinogens.
c. stimulants,

I believe the answer is: Hallucinogens

Hallucinogens refers to the type of substance that could dramatically alter our emotions, thought, and consciousness. So, Consuming hallucinogens could make our brain perceive a certain object as another object.

The most common type of hallucinogens are psychedelics and deliriants.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.