Why is the brute-force approach less ideal here?

Question

Why is the brute-force approach less ideal here?

Option A — Correct answer

Trying every possible x costs O(m).

Option B

It always has better space complexity

Option C

It skips reading some inputs

Option D

It only works on strings

Explanation

Trying every possible x costs O(m).

Modular Inverse - Extended Euclid Pattern Practice Quiz