The impulse response of a causal linear timeinvariant system

The impulse response of a causal linear timeinvariant system is given as h(t).
Now consider the following two statements:
Statement I: Principle of superposition holds
Statement II: h(t) = 0 for t < 0 Which one of the following statements is correct?

1. Statement (I) is correct and Statement (II) is wrong
2. Statement (II) is correct and Statement (I) is wrong
3. Both Statement (I) and Statement (II) are wrong
4. Both Statement (I) and Statement (II) are correct

For causal linear time invariant system
(1) Superposition principal holds true
(2) for impulse input, h(t) = 0 for t < 0.