The Probability That a New Advertising Campaign Will Increase Sales

Multiple Choice

The probability that a new advertising campaign will increase sales is estimated to be 0.80.The probability that the cost of developing the new ad campaign can be kept within the original budget allocation is 0.40.
-Assuming that the two events are independent,the probability that the cost is kept within budget or the campaign will increase sales is

A) 0.68.
B) 0.88.
C) 0.32.
D) 0.20.