The smallest of the following figures is (? )
A.0 B. 1 C.- 1 D.-2
2.0, 1, -2, -3, 5, the negative integer is ().
A.0 B. 1 C.-2 D.-3.5
3. Among the following four numbers, the number less than -2 is ()
A. 1 B.0 C.- 1 D.-3
4. The reciprocal of minus one third is ()