When Entering the Number $1 / 7$ Into a Three Digit Base Ten Calculator, the Round-Off Error

When entering the number $1 / 7$ into a three digit base ten calculator, the round-off error is

A) 0.00143
B) 0.000143
C) $1 / 70$
D) $1 / 700$
E) $1 / 7000$