If (a + b)^(2) - 2 (a + b) = 80 and...

If ` (a + b)^(2) - 2 (a + b) = 80 ` and ab = 16 then what can be the value of ` (3 a - 19 b)` ?

A

`-16`

B

`-14`

C

`-18`

D

`-20`

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