The correct answer is ScriptRunConfig (B) because it is the primary class in Azure ML SDK v1 used to configure and submit training runs. ScriptRunConfig encapsulates all necessary components for a training run including the source directory, training script, compute target, and environment. The community discussion shows 100% consensus with multiple upvoted comments demonstrating ScriptRunConfig usage with detailed code examples. Other options are incorrect: ScriptRun (A) is not a valid Azure ML class, RunConfiguration (C) is a lower-level configuration class not typically used directly for script runs, and Run (D) represents a submitted run instance rather than the configuration for submitting one.