Choose the appropriate preposition for the following sentence:

My sister was married _______ the time I turned sixteen.

by

The correct answer is Option (1) - by

• The phrase "was married by the time" indicates that her marriage occurred before or at the point when the speaker turned sixteen.

OTHER OPTIONS

• "in" → Typically refers to a period during which something happens, not specific to a point in time.
• "on" → Used for specific days or dates, which doesn’t fit in this context.
• "at" → Generally refers to a specific point in time but doesn’t work well with the phrase "the time."