The information in paragraph 9 does not explicitly state that Lori is upset or will miss Darla, nor does it mention that Darla usually plans events for Lori. The passage suggests that Darla has been accepted into Yale and will be distant from her friends, but it does not clarify whether Lori is going to college or not. Therefore, the most supported inference from that paragraph is:
B. Darla and Lori aren’t going to college together.
This is inferred from the context that Darla is going to college early and 200 miles away, suggesting that Lori likely is not.