given a + b = 1, find the value of 2 a + 2 b. two solutions are presented below. only one is correct, even though both yield the correct answer.
Choose the correct choice from the following answers:
A) 3 B) 5 C) 4 D) 2 E) 1
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<result>D</result>
given a + b = 1, find the value of 2 a + 2 b. two solutions are presented below. only one is correct, even though both yield the correct answer.
subtract(add(add(2, 1), 2), add(2, 1))
because a + b = 1 , 2 a + 2 b = 2 ( a + b ) = 2 × 1 = 2 . correct answer d