Each of the following problems consists of a question and the statements labelled $(1)$ and $(2)$. You must decide whether the data given for the statements are sufficient to answer the questions.
If $n$ is an integer, is $n$ even?
- $2n$ is an even integer.
- $n - 1$ is an odd integer.
- Statement $(1)$ ALONE is sufficient, but statement $(2)$ alone is not sufficient.
- Statement $(2)$ ALONE is sufficient, but statement $(1)$ alone is not sufficient.
- BOTH statements TOGETHER are sufficient, but NEITHER statement alone is sufficient.
- EACH statement ALONE is sufficient.