Molly has cups of sugar. she used cup of sugar. she wants to model a subtraction problem on a number line to find how much sugar she has left. molly’s first step is shown below.

what should molly do next, and how much sugar does she have left?
a. move units to the right. she has cups of sugar left.

b. move unit to the left. she has cup of sugar left.

c. move units to the left. she has cup of sugar left.

d. move unit to the right. she has cups of sugar left.