I would say A. Inflection because an inflection is a change to the form of a word to change its grammatical function
Answer:
By, buy
Explanation:
Joys went to the shop by (beside) The dentists office to buy (purchase) Materials for her project.
The subject would be her “lucky pencil”, but since it’s simple- it would just be her pencil.
Notes should be easy to follow to maintain the speakers train of thought