Sophia, a third-year college student majoring in Elementary Education, goes to an elementary school to conduct observation research on a third-grade class. She first stops in to see the principal to get permission to do a class observation, and subsequently meets the third-grade teacher and is introduced to the class. She spends the day with the children getting involved in all of the daily events. Based on this description of events, select the MOST accurate observer role for Sophia

a. Complete participant: Participate fully: true identity and purpose are not known to subjects
b. Participant-as-observer: Make known your position as a researcher and participate with the group
c. Observer-as-participant: Make known your position as a researcher, do not actually participate
d. Complete observer: Observe without becoming a participant