The correct option is A No change
Adverbs of manner usually go at the end of a sentence, after the object.
The given sentence ends with the adverb of manner, 'bravely', which is placed after the object ('the battle'). Hence the sentence does not need to be changed and option A is correct.
Option B is incorrect because the adverb of manner cannot be placed between the verb 'fought' and the object 'battle'.
Option C is incorrect because an adverb of manner cannot be placed in the front position, i.e., before the subject.
Option D is incorrect because the adverb here is modifying the object 'battle' but adverbs do not modify nouns.