单项选择题

Millions of people in the Himalayas are in danger of massive earthquakes, according to scientists in the U. S. and Indi

a. They say great earthquakes are the only release for stress that has been building within the earth's crust along the southern edge of the Himalayas for decades.
There are many ways of release for stress building within the earth crust such as an earthquake.A. RightB. WrongC. Not mentioned