Q: A two-dimensional array is also called

Answer: C

Explanation:

Answer: C

A two-dimensional array in C++ stores data in the form of rows and columns, just like a table.

Because of this row–column structure, a two-dimensional array is commonly referred to as a matrix.

Why other options are incorrect

A) Single array ❌
A single array refers to a one-dimensional array, not a 2D array.
B) Pointer array ❌
A pointer array is an array of pointers, which is different from a 2D array.
D) String ❌
A string is a character array, not necessarily two-dimensional.