[单选题]
An object is launched horizontally from a heigm-r vp u8f(1dght in a vai *l4ec(jy u2 yi9fzw+cuum. Which of the following graphs correctly shows(f+i 9yz4iw eujl2y*c how the square of the velocity $v^2$ of the object varies with the square of time $t^2$?
