Correct option is B
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Error in Part (2):
"on that time" → "at that time"
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Explanation:
· The correct phrase is
"at that time", because
"at" is used for specific points in time.
·
"On" is used for specific dates and days (e.g., "on Monday," "on 5th June").
·
"On that time" is incorrect because
"time" refers to a general moment, not a specific date.
·
Corrected sentence:
·
"I also used to write scripts for hosting school functions. Though, at that time I hadn’t identified this interest."