Which expression is equivalent to 7\dfrac34 - \dfrac127 4
3
​
−
2
1
​
7, start fraction, 3, divided by, 4, end fraction, minus, start fraction, 1, divided by, 2, end fraction?
Choose 1
Choose 1

(Choice A)
A
\dfrac12+\left(-7\dfrac34\right)
2
1
​
+(−7
4
3
​
)start fraction, 1, divided by, 2, end fraction, plus, left parenthesis, minus, 7, start fraction, 3, divided by, 4, end fraction, right parenthesis

(Choice B, Checked)
B
7\dfrac34+\left(-\dfrac12\right)7
4
3
​
+(−
2
1
​
)7, start fraction, 3, divided by, 4, end fraction, plus, left parenthesis, minus, start fraction, 1, divided by, 2, end fraction, right parenthesis

(Choice C)
C
\dfrac12+7\dfrac34
2
1
​
+7
4
3
​
start fraction, 1, divided by, 2, end fraction, plus, 7, start fraction, 3, divided by, 4, end fraction

(Choice D)
D
-7\dfrac34+\left(-\dfrac12\right)−7
4
3
​
+(−
2
1
​
)
i really need help