Set M contains number that satisfy the condition that, if integer x is in the set then x + 2 will also be in the set M. If -4 is one value in the set, which of the following values must also be present in the set M?
I) -6
II) -2
III) 2
Choose one:
A) I only
B) II only
C) I and II only
D) II and III only
E) I, II and III
Since -4 is in the set, then the set must also include -2, 0, 2, 4, etc...   Depending on whether -4 is the starting element in the set or not, we can have -6...or not.   The answer is II and III only.
<result>D</result>
Set M contains number that satisfy the condition that, if integer x is in the set then x + 2 will also be in the set M. If -4 is one value in the set, which of the following values must also be present in the set M?
I) -6
II) -2
III) 2