Java arrays: Which one of the following declarations causes a compiler error?

Introduction / Context:
Two-dimensional array initialization in Java requires proper nesting of braces to form rows. This question focuses on identifying the malformed declaration among otherwise valid array declarations.

Given Data / Assumptions:

• Single- and multi-dimensional arrays are being declared.
• Boxed types and primitive arrays are mixed to test syntax understanding.

Concept / Approach:
A two-dimensional array literal uses nested braces: new int[][] { {row1}, {row2} } or simply { {row1}, {row2} } when used with a declaration. Flat lists without nested braces are illegal for 2D arrays.

Step-by-Step Solution:

Verification / Alternative check:
Correct form for B would be int[][] scores = { {2,7,6}, {9,3,45} };

Why Other Options Are Wrong:
They all follow legal Java syntax for array declarations and initializations.

Common Pitfalls:
Forgetting inner braces for multi-dimensional initializers; mixing up new int[] { ... } versus size-based creation.

Final Answer:
int[][] scores = {2,7,6}, {9,3,45};