Answer
(d) all of the preceding
Work Step by Step
$Tangential \,\,acceleration = a_{t}=\frac{\Delta v}{\Delta t}=\frac{\Delta(r\omega)}{\Delta t}=\frac{r\Delta \omega}{\Delta t}=r\times(\frac{\Delta \omega}{\Delta t})=radius \times angular\,\, acceleration$
Hence, a,b,c, all are true.