The Probability That House Sales Will Increase in the Next

Multiple Choice

The probability that house sales will increase in the next six months is estimated to be 0.25.The probability that the interest rates on housing loans will go up in the same period is estimated to be 0.74.The probability that house sales or interest rates will go up during the next six months is estimated to be 0.89.
- The events of 'increase in house sales' and 'no increase in house sales' in the next six months are

A) statistically independent.
B) collectively exhaustive.
C) mutually exclusive.
D) Both B and C.