Using Parity, the Probability for Detecting an Error, Given That

Multiple Choice

Using parity, the probability for detecting an error, given that one has occurred, is:

A) about 50% for either even or odd parity
B) about 70% for even parity and 30% for odd parity
C) about 30% for even parity and 70% for odd parity
D) about 0% for either even or odd parity
E) about 100% for either even or odd parity