Select the most appropriate option to fill in blank 2.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. worth.
The passage states that primitive cultures have a rich history that should be studied and preserved.
"Worth" means valuable or deserving attention, making it the right choice.
Other options:
Important: Close in meaning, but "worth studying" is a more natural phrase.
Insignificant and Trivial both mean unimportant, which contradicts the sentence.
Hence, the chosen option is correct.