Answer:
A. an, a
Explanation:
In English, there are two indefinite articles; they are a and an. When you refer to something for the first time or refer to a particular member of a group or class, you usually use the indefinite article. Use a when the next word begins with a consonant sound, but use an when the next word begins with a vowel sound.
I would say grammar and punctuation. Learning how to do MLA formats amongst other things to prepare for highschool.
