Yesterday, a group of scientists observed a family of gorillas. The adult male gorilla was sitting calmly, watching his family. The young gorillas were playing and chasing each other in the trees. Today, the scientists are preparing a report about their observations and planning their next visit.
Which statement accurately reports on the gorillas' actions yesterday?
A) The adult male gorilla is sitting calmly now.
B) The young gorillas are playing in the trees today.
C) The adult male gorilla was watching his family.
D) The scientists were preparing a report yesterday.