South African Mathematics Olympiad

On a line segment with the points $R$, $A$, $T$ and $E$, the ratio $RA:AT=1:3$ and $AT:TE=5:2$. The ratio $RA:TE$ is (A) $1:2$ (B) $1:3$ (C) $3:5$ (D) $5:6$ (E) $3:2$