Alpine Tundra Is Found on the Top of Mountains While

Alpine tundra is found on the top of mountains while arctic tundra is found close to the North Pole. These two biomes have similar plants and animals even though they can be located in very different regions of the world. Why are these two biomes so similar?

A) Both alpine tundra and arctic tundra are found close to coniferous forests.
B) Alpine tundra is cold and dry because it is at a high latitude and arctic tundra is cold and dry because it is at a high altitude.
C) Both types of tundra are located in areas of intense sunshine.
D) Alpine tundra grows mostly grasses because the soil is poor and arctic tundra grows mostly grasses because the soil is frozen.
E) Both types of tundra support large grazing herds that keep the grasses clipped short.