Admission to Yale, and to its peers institutions, is tremendously competitive and subjective. Students with straight 'A's' and 2400 SAT's are rejected every year, while student's with less than perfect scores are admitted.
When we toured Yale about 5 years ago, we were told this story from a Yale student leading the tour. I have no idea if the story is true, but here it is:
We were standing alongside the Women's Table (Public art at Yale - The Women’s Table
). The student brought up the fact that Maya Lin, who designed the table, submitted her design for the Vietnam Memorial in Washington, D.C. as a class project and received a B minus from her professor, even though her design is now ranked tenth on the "List of America's Favorite Architecture."
"My gosh," said one parent, "What do 'C' student's do?"
Without missing a beat, the student replied "They become the 43rd President of the United States."
"Which reminds me," said the student. "In honor of George W. Bush, Yale reserves at least one slot in Admissions for a 'C' student, because you never know who will become the next US President."
Work hard, do your best, and the rest will follow! Best of luck to you in your sophomore year.