Read the following text from a student essay. How can the writer best improve his or her grammar and mechanics?
When I'm asked to name my favorite teacher, I immediately think of Mr. Sweeney. In fifth grade, Mr. Sweeney taught us all about architecture he had the class start by learning to measure things very accurately. We studied environmentally friendly building methods, and we designed and built our own homes of the future. Mr. Sweeney was always fun and interesting, he believed that we could do more than we thought we could do. He helped me break boundaries in my life, he was a positive influence on me and will always be one of the most inspirational people in my life.
A. by using correct verb tenses
B. by fixing run-on sentences
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

B