What is the beta of the following portfolio?

Stock E$($R$)$ Beta Investment

A $10\%1\mathrm{.}4$ $$15,000$

B $12\%2\mathrm{.}1$ $$60,000$

C $8\%0\mathrm{.}5$ $$75,000$

a$.0\mathrm{.}10$

b$.1\mathrm{.}33$

c$.$ none of the listed items is correct

d$.1\mathrm{.}30$

e$.1\mathrm{.}0$