Why is the brute-force approach less ideal here?

Question

Why is the brute-force approach less ideal here?

Option A — Correct answer

Merging one by one can repeatedly scan a growing list.

Option B

It always uses constant time

Option C

It avoids all comparisons

Option D

It requires no extra state

Explanation

Merging one by one can repeatedly scan a growing list.

Merge K Sorted Lists - Min-Heap Multiway Merge Pattern Practice Quiz