Which one of the following characteristics promotes cross-pollination?

Given below are two statements.
Statement $I$: Self-incompatibility is a device that prevents outbreeding.
Statement $II$: Self-incompatibility is a genetic mechanism due to which germination of pollen on the stigma of the same flower is inhibited.
In the light of the above two statements,choose the correct answer from the options given below.

Mention two strategies evolved to prevent self-pollination in flowers.

What is the outbreeding device,where the stamens and carpels mature at different times called?

Which one of the following usually does $NOT$ promote self-pollination?

Explain what are outbreeding devices. Give its importance.