The correct answer is C. For
Explanation:
In grammar, a preposition is a type of word mainly used with the purpose fo linking pronouns, nouns or similar to other elements in a sentence, because of this prepositions are usually placed besides nouns or pronouns. Additionally, most prepositions are short words and are a defined group of words, which means they are defined and usually do not change over time. Examples of prepositions include the words in, on, at, after, for, etc. Considering this, in the case of the sentence "Alissa bought her sister a jacket for winter" the preposition is the word "for" that appears beside the noun "jacket" and helps to connect this to the word "winter" to show purpose.
