Correct option is D
Event (ii): Few foreigners visited the Taj Mahal during the weekdays.
These two events refer to different groups of people (general public vs. foreigners) and occur on different days (weekend vs. weekdays).
There is no direct cause-effect relationship between them.
They are independent events, possibly due to their own separate reasons (e.g., holidays, travel plans, tour packages, etc.)
Thus, the correct option is (d) Both the events are effects of some independent causes.