To solve this question, the user needs to know prepositions and how they are used in sentences. The user must determine which preposition is correct in the given context.
The correct preposition to use in this sentence is "on" as it is used for days of the week.
Option A - "in" is incorrect as it doesn't convey the correct meaning. "In" is usually used for months and years.
Option B - "on" is the correct answer. We use "on" for days of the week.
Option C - "to" doesn't give the correct meaning in the given context.
Option D - "at" is incorrect as it is usually used for specific times.