The entries in a 3 \times 3 array include all the digits from 1 through 9 , arranged so that the entries in every row and column are in increasing order. How many such arrays are there?

**Answer Choices**

A. 18

B. 24

C. 36

D. 42

E. 60

The entries in a 3 \times 3 array include all the digits from 1 through 9 , arranged so that the entries in every row and column are in increasing order. How many such arrays are there?

**Answer Choices**

A. 18

B. 24

C. 36

D. 42

E. 60