She was new at playing violin, what did she immediately notice developing?
Options:
- look melodramatic
- string
- read music
- calluses
- making music
Let's think now! Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
During playing voilin, the fingers of hands often come in friction with the wires where calluses are formed. Calluses is a thicked skin layer due to friction which can happen due to playing voilin.
So, the final answer is calluses.