Comprehension Passage
The following table shows the number of students enrolled in four different Colleges (A–D) during the four years from 2020 to 2023. Based on the data in the table, answer the questions that follow.
| Year | A | B | C | D |
|---|---|---|---|---|
| 2020 | 1200 | 900 | 1000 | 700 |
| 2021 | 1100 | 800 | 1300 | 900 |
| 2022 | 1400 | 1000 | 1200 | 1100 |
| 2023 | 600 | 700 | 800 | 1000 |
What is the average number of students enrolled in College B over all the four years?
1
850
2
750
3
840
4
720