Amanda simplifies the following expression and shows her work below. What mistake did Amanda make that resulted in an incorrect answer?
14−8÷2 + 3∙4
14−4 + 3∙4
14 – 7 ∙ 4
14−28
-14
a
She added before multiplying
b
She multiplied before dividing
c
She subtracted before adding
d
She added before dividing
