Keep in mind an adverb gives more information or describes further information on the verb, adjective, or other adverb.
The answer is A. The word 'Winter' is incorrectly capitalised as seasons do not require capitalisation. Initially, it may seem that C is also a possible answer, as particles needn't be capitalised within the title of a text, but because "A" is at the beginning of the name of the text, it requires capitalisation.
Answer:It should be A.
Explanation:
A study would be the most reliable. Sorry if I’m a bit late.