Herkogamy favours

Answer: Option B

Herkogamy favours Cross-pollination.
Herkogamy (or hercogamy) is the spatial separation of the anthers and stigma in hermaphroditic angiosperms. It is a common strategy for reducing self-fertilization.
In self-incompatible species, herkogamy may function primarily to reduce sexual interference, whereas, in self-compatible plants, it is usually considered an adaptive character that decreases the likelihood of self-pollination and increases the opportunity for outcrossing.