The correct option is D.
From the passage given above, it can be seen that the author stated that different cultures engage in marriage institution for different reasons. While some cultures based their marriage on love, some culture based their own on economic gains and some on political gains. This shows that, different societies have vary ideas about the purpose of marriage.<span />
Answer: Adhere to, Stand by
Explanation: “To keep the project as simple as possible, it is best to choose only one topic and adhere to it”
“To keep the project as simple as possible, it is best to choose only one topic and stand by it”
Hope that helps!
Vex meaning making someone feel annoyed, frustrated, or worried.