Select the most appropriate option to fill in blank 3.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. time.
Context: The sentence refers to a point when Helen Keller was six years old.
Meaning of the words:
Instance – A specific example.
Day – A 24-hour period.
Time – A point or period when something occurs.
Period – A length of time.
Correct word: Time
Reason: "By the time" is the correct phrase to refer to a certain age or moment.
Final Sentence: ...but by the time she was six years old...
Hence, the chosen option will be correct.