Local residents gathered yesterday, June 10th, at Willow Creek Park for a massive tree-planting event. Organized by the 'Green Future' environmental group, the initiative aimed to plant over 500 saplings to combat deforestation and improve local air quality. The event, which started at 9:00 AM and concluded by 2:00 PM, saw participation from over 200 volunteers, including families and students from Riverside High School. Mayor Thompson also attended, emphasizing the city's commitment to sustainability. This project is part of a larger plan to increase green spaces by 20% over the next five years. 'We believe every tree planted is a step towards a healthier planet,' stated Sarah Jenkins, co-founder of Green Future, addressing the crowd.
Approximately how many volunteers participated in the event?
A) Exactly 500.
B) Less than 200.
C) Over 200.
D) 20% of the city's population.
E) Only students from Riverside High School.