Which of the following pairs of events would seem to be mutually exclusive? (Without more complete information, it may be impossible to make a definite judgment, but use your instincts and make a logical case.)
a. A = a Democrat wins the next Presidential election.
B = a Republican wins the next Presidential election.
b. A = rolling a six on one roll of one die
B = rolling a four on the same roll of the die
c. A = being right-handed
B = being left-handed