A student wants to measure, as accurately as possible, the diameter of a wire (known to be about $1\ \text{mm}$) and the internal diameter of a pipe (known to be about $2\ \text{cm}$). Which instruments would be most suitable for the student to use for these measurements?
- Awire: calipers; pipe: calipers
- Bwire: calipers; pipe: micrometer
- Cwire: micrometer; pipe: calipers
- Dwire: micrometer; pipe: micrometer