Determine whether the statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement.
The sum of the probabilities of all possible outcomes in an experiment is 1.
Choose the correct answer below.
A. This statement is false. To make this statement true, change "1" to "2".
B. This statement is false. To make this statement true, change "1" to "4".
C. This statement is false. To make this statement true, change "1" to "3".
D. This statement is true.