Answer:
d. Southeastern United State
Step-by-step explanation:
The humid subtropical climate, as suggested by the name, is the climate in which the weather tends to be hot and humid. This happens in the summer, while winters tend to be mild and not too cold.
Few parts of the world have this characteristic climate. Among them is the southeastern part of North America. This region also has thunderstorms and tornados in the spring.
Other parts in which humid subtropical climate is found are the southeastern part of northern America, southeast Asia, and some parts of southern Europe.