Find the Interval of Convergence for the Solution of the Differential

Multiple Choice

Find the interval of convergence for the solution of the differential equation $$y ^ {t} + 3 x y = 0 \text {. }$$

A) $[ 3 , \infty )$
B) $( - 3 , \infty )$
C) $( 0 , \infty )$
D) $( - \infty , \infty )$
E) $[ 0 , \infty )$