Gabriel Angel holds a $$200,000$ portfolio consisting of the following stocks:

$\backslash$table$[[$Stock$,\frac{\text{I}\text{n}\text{v}\text{e}\text{s}\text{t}\text{m}\text{e}\text{n}\text{t}}{?},$Beta$],[$A$,$$$50,000,1\mathrm{.}60],[$B$,$$$50,000,1\mathrm{.}20],[$C$,$$$50,000,1\mathrm{.}90],[$D$,$$$50,000,0\mathrm{.}90],[$Total$,$$$200,000,]]$

What is the portfolio's beta? Do not round your intermediate calculations.

$$ a$.1\mathrm{.}900$

$$ b$.0\mathrm{.}350$

c$.0\mathrm{.}700$

d$.1\mathrm{.}400$

e$.1\mathrm{.}346$