Evaluate
each statement separately.
Statement (1) is insufficient. Although the statement tells us that
zero is the middle number, which indicates where the numbers fall on the
number line, we can't tell whether they're consecutive or at a different
fixed interval. Eliminate Choices (A) and (D).
Statement (2) is insufficient.
If the range equals 4, then the highest and lowest numbers are four units
apart. So, the five numbers in the set must be consecutive.
But, the statement does not tell you where the numbers fall on the number
line. For example the set could be:
{1, 2, 3, 4, 5} or {0, 1, 2, 3, 4} or any other set of five consecutive
numbers.
Since there is more than one possible sum, the statement is insufficient
and we eliminate Choice (B).