Read the following excerpt from a student essay. How can the writer best improve his or her grammar and mechanics?
When my grandparents first bought a computer, they didn't know how to use the Internet, so I sit down with them and show them the ropes. We go over a few basic terms, and I introduce them to different browsers. I taught them where to find the URL for a website and how to use search boxes. We cover different ways to navigate around a website; for example, I show them how to use a mouse, how to scroll up or down a page using the scroll bar, and how to click on links. Now they are excited to be online.
A. by using consistent verb tenses
B. by correcting misplaced modifiers
C. by using commas correctly
Select the correct answer from the given choices and respond with the letter of the chosen option.
Answer: A