Although your question is incomplete, I would guess B. African Americans.
The open door policy impacts lasted for decades and they have three major impacts; increase Chinese backlash against foreigners. Chinese and American conflict with Japan. Increased US interest in East Asia
When it came to the early 1500's, there was no separation of church and state. The king was always kept in check by the church. Although everybody in the kingdoms answered to the kings, the kings answered to God. All the rules that were put in place were done so in respect of the church's commandments, keeping in mind what God wanted the people to do.