Read the passage and answer the question.
PASSAGE (G01): During the science fair, Mariam displayed a small model of a volcano. She explained how pressure builds up inside the earth. When visitors asked questions, she answered confidently and wrote notes for later improvement.
QUESTION: In the sentence “During the science fair, Mariam displayed a small model of a volcano,” what is the grammatical role of the phrase “During the science fair”?
Select the ONE best answer from the options panel.