Theo was asked to use the distributive property on the following problem on his algebra test: -2(3x-1). He writes that the answer is -6x - 2. however, his teacher told Theo his answer was incorrect. What could be the reason for his mistake.
A: Theo distributed a 2 to each term instead of -2
B: Theo forgot to subtract 3x - 1 before he distributed the -2
C: Theo did not distribute a -2 to the -1
D: Theo did not make any mistakes
