The Correct answer is B.
Explanation
If , then
, so the second condition fails. If
,then
, so the second condition fails for this function also. The other three options satisfy
, so it remains to check whether they satisfy the first condition.
If , and
, then
and
, so it is not true that
for all integers
. This means that the function
does not satisfy the first condition. If
, and
, then
and
, so it is not true that
for all integers
. This means that the function
does not satisfy the first condition.
However, if , then
, for all integers
. Also,
.Therefore, the function
is the only option that satisfies both conditions.
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