Base on the question where as asking to complete the passage and base on my research and further investigation, One of the way to develop a main idea for the advertisement is to conduct product research. I hope you are satisfied with my answer and feel free to ask for more if you have question and further clarification
The answer is are because its a verb that is stating something.
Answer: I think the second line is correct it you put a apostrophe in the first and before Simpson.
Explanation: The third line is also correct it is a I;I compound sentence. But the first line has some mistakes.
To persuade the consumer to get the item for a reason.