Which expression is equivalent to four?

C -  10 - (4 + 2)  do the brackets first.

10 - (6) = 4

A.

(10 – 4) + 2

= 6 +2 

= 8

B.

10 – 4 + 2

= 10 + 2 - 4

= 12-4

= 8

C.

10 – (4 + 2)

= 10 - 6

= 4

D.

(10 – 4 + 2)

=> same as B

So, C is the correct answer