The correct option is
A 4
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1445485/original_Screenshot_2021-11-26_223223.png)
Let's convert the fractions in the given table into an equivalent fraction with denominator 8.
14 = 14 × 22 = 28
12 = 12 × 44 = 48
34 = 34 × 22 = 68
The new table will look like:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1452032/original_Screenshot_2021-12-01_164545.png)
Now, let's plot the fractions on a line plot graph.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1452054/original_Screenshot_2021-12-01_164815.png)
When denominators are the same, then more the numerator, more is the value.
Hence, 4 courses have a duration more than 28 years.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1452060/original_Screenshot_2021-12-01_164843.png)