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 ()