Which of the following events are examples of the positive effects that can result from racial and ethnic blending?

i. Strong tension in a neighborhood between families from different backgrounds.
ii. Mutual respect between sports team members who practice different religions.
iii. Tolerance within a community for individuals with unique physical characteristics.
iv. Violent physical attacks between fellow students based on hair color differences.

A.
i. and ii.
B.
i. and iv.
C.
ii. and iii.
D.
iii. and iv.