Which words in this sentence are an independent clause?
scientists have found traces of an ancient forest that once grew on an empty lot in new jersey when the region had a tropical climate. a. that once grew on an empty lot in new jersey b. scientists have found traces of an ancient forest c. on an empty lot in new jersey d. when the region had a tropical climate

Which sentence corrects the error in pronoun-antecedent agreement? new team members should pick up his or her jersey from the activities office. if a team member is unable to attend a practice, he or she must provide a doctor's note. if students wish to compete, he or she must maintain a grade point average above 2.5. students are not permitted to attend away games without the consent of her parents or guardians.