A point mass starts moving in a straight line with constant acceleration. After time `t_0` the acceleration changes its sign, remaining the same in magnitude. Determine the time T from the beginning of motion in which the point mass returns to the initial position.
A. `(2v(n+1))/(n)`
B. `(v(n+1))/(n)`
C. `(2v(n+1))/(n)`
D. `(2v(n+1))/(n)`