Love the profile picture tho
Answer:
The Structure of "B" is alkene.
Explanation:
The compound "A" having R- configuration and undergoes Hofmann elimination to form an alkene.
The compound "B" on oxidatively cleaving with ozone followed by dimethyl sulfide forms 
and 
The structure of "A" and"B" is as follows.
The answer is fossils. they find and study them
Answer:
C. Be in the same group
Explanation:
Most elements in the same group have similar properties.
A census is a survey of a complete population and not just a small sample.
You can hold a census of your entire school, your whole city, or the entire state.
A census has to include EVERYONE in the population you want to draw conclusions on. A sample would only include a small number of people from any group. The census must survey all of them.
