Average Annual Attendance (in hundreds) at Two Community Theaters, 2018–2021
| Year | Riverside Playhouse | Elm Street Theater |
|---|---|---|
| 2018 | 12 | 9 |
| 2019 | 15 | 11 |
| 2020 | 4 | 3 |
| 2021 | 10 | 8 |
A student is analyzing attendance patterns at two community theaters, Riverside Playhouse and Elm Street Theater.
The year in which the combined attendance at the two theaters was lowest was _____
Which choice most effectively uses data from the table to complete the statement?