In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Q: Question: When was the building off of which the sisters flung themselves first constructed? Passage:Taking the earliest first, Euripides Ion, lines 22–23; 484–485, mentions her, but in the Moses Hadas and John Mclean 1960 Bantam Classics translation they have Euripides say respectively: "(Athena) gave Erichthonius to Aglaurus' daughters (not sisters) to keep." and later, speaking of "a haunt of Pan": "There the daughters of Aglaurus still tread the measures of their dance, on the green lawns before the shrine of Pallas (Athena)...".According to the Bibliotheca, Hephaestus attempted to rape Athena but was unsuccessful. His semen fell on the ground, impregnating Gaia. Gaia did not want the infant Erichthonius, so she gave the baby to the goddess Athena. Athena gave the baby in a box to three women—Aglaurus and her two sisters Herse and Pandrosus—and warned them to never open it. Aglaurus and Herse opened the box. The sight of the infant caused them both to go insane and they threw themselves off the Acropolis, or, according to Hyginus, into the sea.
 Links: a. Pan (god) b. Acropolis of Athens c. Gaius Julius Hyginus d. Gaia
A: 
b