C#.NET — Complete the foreach so that all elements of the jagged array are printed: int[][] a = new int[2][]; a[0] = new int[4] { 6, 1, 4, 3 }; a[1] = new int[3] { 9, 2, 7 }; foreach (int[] i in a) { /* Add loop here */ Console.Write(j + " "); Console.WriteLine(); }

Introduction / Context:
Jagged arrays are arrays of arrays. To iterate every value, first enumerate each inner array, then enumerate its elements.

Given Data / Assumptions:

• a is int[][] with rows of different lengths.
• The outer foreach provides each inner array as i.

Concept / Approach:
The idiomatic nested foreach is: foreach (int[] i in a) { foreach (int j in i) { ... } }. This naturally handles different row lengths without index math.

Step-by-Step Solution:

Verification / Alternative check:
Run the code; it prints 6 1 4 3 on the first line and 9 2 7 on the second, matching the jagged structure.

Why Other Options Are Wrong:

• A/B: Use for-loop syntax or invalid calls; also not appropriate for jagged enumeration.
• C/E: a.Length is a scalar; you cannot foreach over an int.

Common Pitfalls:
Confusing rectangular array APIs (like GetUpperBound) with jagged arrays, which are just arrays whose elements are arrays.

Final Answer:
foreach (int j in i)