What kind$($s$)$ of tests with $100\%$ coverage, guarantee bug$-$free code:

C$0($statement coverage$)$

C$1($conditionals coverage$)$

C$2($paths coverage$)$

DU$-$coverage $($all pairs of define X$/$use X for every variable X$)$

Select the best answer.

A and B

A$,$ B$,$ C$,$ and D

C by itself

No combination of those tests guarantee bug$-$free code.