I believe the answer is B
Dear (said friend),
Hey how are you? I know we both moved to different colleges this year and that okay we can write and visit each other. I actually changed my plans for college, I go to UCLA now and im majoring in journalism with hopes of working for New York Times and starting my own blog. What are your academic plans for this year? How have you been since we last talked?
from (your name here)
Answer:
Thick segments of tissue would not be enough for Annie Dillard's needs.
Explanation:
When Annie refers to "tissue," she is referring to biological tissues that will be used in the new microscope kit that she received from her parents. For it to be possible for her to visualize biological tissues in this microscope, it is necessary that she has "thin segments of fragile tissue," because thick segments of tissue would not allow a good visualization, with details, in her microscope.