I think B. Because this paragraph talks about both reasons for marriage and doesn't really take either side so it's just telling you that different societies have different reasons for marriage.
Immolate- to kill or offer as a sacrifice, especially by burning.
School uniforms should/should not be implemented in (whatever the prompt is).
Your thesis should be simple and state the side of the argument you are taking.
Remember that your thesis should be the last line of you introductory paragraph.
Ok, so you know that the number will be 7 tens more, or 70 more, then the given number, 624. In order to find your new number, you will add 624, and 70, together, hopefully getting 694. And that will be your new number.