What Nucleus Decays by Successive ?,?,? Emissions to Produce Uranium-236 ${ }_{88}^{232} \mathrm{Ra}$

Multiple Choice

What nucleus decays by successive ?,?,? emissions to produce uranium-236?

A) ${ }_{88}^{232} \mathrm{Ra}$
B) ${ }_{88}^{230} \mathrm{Ra}$
C) ${ }_{92}^{240} \mathrm{Pu}$
D) ${ }_{94}^{242} \mathrm{Pu}$
E) ${ }_{92}^{940} \mathrm{~L}$