Excerpt from A Taste of Korea
Elizabeth Kibler

5 Joshua thought it was important to know what would offend Dong Soo and his family. Therefore, understanding his friend’s culture was vital. Joshua asked Dong Soo to tell him about the Korean culture. Dong Soo suggested that they start with food. He explained that food was very important in Korean culture. For instance, Koreans would never sit down in front of a television while eating a meal. To Koreans, meals are more than mere nourishment—they are a way to show manners.
A synonym for the word vital in paragraph 5 is
A) proper.
Eliminate
B) difficult.
C) essential.
D) wondrous.