Answer: Python

The correct answer is Python (C) because Snowpark API supports Python, Scala, and Java for creating User-Defined Functions (UDFs). The community discussion shows strong consensus with 89% selecting C, and multiple comments reference official Snowflake documentation confirming Python is supported. Option A (Swift) is not supported by Snowpark. Option B (JavaScript) is not supported for UDFs via Snowpark (though JavaScript is supported for stored procedures). Option D (SQL) is not the correct answer since the question specifically asks about languages supported by Snowpark API, and while SQL can be used for UDFs in Snowflake generally, it's not through the Snowpark API framework.

Author: LeetQuiz Editorial Team