[单选题]
Suppose one twin takesmc5*e*u w* cw)eb w-ol rgydu,8t mu40a ride in a space ship traveling at a very high speed to a distant star and back again, while the 8yd u,0rmg u4tother twin remains on Earth. The twin that remained on Earth predicts that the astronaut twin is
A. younger.
B. the same age.
C. older.
D. cannot be determined from the given information
Post time 2024-1-14 16:03:04