What variable expression represents the phrase "the difference of twice a number and 3"?

a. 3-2x

b. x-3⋅2

c. 2x-3

d. 2-x+3

B I believe not entirely possitive

C. because x represents "a number" it reads, "the difference ... " and difference means subtracting. Also how would you write twice a number? 2n, it basically means a number times two. But that's not all. You still have to subtract by 3 so its 2n-3.