Tobie is estimating the sum of the expression -50 51. which reasoning would lead tobie to the right answer?
A. 50 50 is equal to -100 plus -1 is -101.
B. 50 50 is equal to zero plus -1 is -1.
C. 50 50 is equal to zero plus 1 is 1.
D. 50 50 is equal to 100 plus 1 is 101.