Correct option is A
The correct answer is CBA.
Error Explanation:
· The word "pivotal" (A) should describe "strategic advantage", not "to launch".
· The word "reluctance" (C) should describe "to launch", meaning hesitation.
· The word "offensive" (B) is correctly placed.
Correct Sentence:
"The commander’s reluctance to launch the offensive at dawn cost the army a pivotal strategic advantage in the battle."