A eunuch who did not see well saw a bat perched on a reed and threw a pumice stone at him which missed
The correct answer is becoming an astronomy researcher
For starters, it is the only appositive phrase. It is also non-essential because the sentence conveys full meaning even if it was removed.
Answer:
The researchers discovered a negative relationship between mobile phone usage and students' academic performance, such that every 100 minutes that a student spent using their phone a day lead to the student dropping 6.3 places in terms of their academic school ranking.