To answer this question, you need to understand prepositions and their usage.
The correct preposition to use in this context is "in".
Option A) "from" - This option is incorrect because "from" indicates a starting point or origin, which does not fit the context of becoming the greatest violinist.
Option B) "in" - This option is correct because "in" is used to indicate being the greatest violinist within the world.
Option C) "of" - This option is incorrect because "of" indicates possession or belonging, which does not fit the context of becoming the greatest violinist.
Option D) "was" - This option is incorrect because it is a verb indicating past tense, whereas the sentence requires a preposition to show the relationship between the violinist and the world.
The correct answer is option B) "in". This option is correct because it accurately expresses the idea of becoming the greatest violinist within the world.