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Odd and Even Integers

ACTMAT-EV9JEA

Which of the following expressions will not yield an odd integer result for all positive integer values of $a$ and $b$?

A

${ a }^{ 2 }+{ b }^{ 2 }$

B

${ (a+2) }^{ 3 }+{ b }^{ 2 }$

C

${ (2a) }^{ 3 }+{ 12b }$

D

$2a+{ 3{ b }^{ 2 } }$

E

$4a-{ b }^{ 4 }$