The Split Panes command keeps rows or columns visible when scrolling in a worksheet

What is the output of the following code fragment?

int array[4][4], index1, index2; for(index1=0;index1<4;index1++) for(index2=0;index2<4;index2++) array[index1][index2]=index1 + index2; for(index1=0;index1<4;index1++) { for(index2=0;index2<4;index2++) cout << array[index1][index2] << " "; cout << endl; } a. 0 1 2 3 1 2 3 4 2 3 4 5 3 4 5 6 b. 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3 c. 0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 d. 0 0 0 0 0 1 2 3 0 2 4 6 0 3 6 9

Some keys on a keyboard, like the Caps Lock and Number Lock keys, are ____ keys, which are pressed once to turn the feature on and again to turn the feature off.

A. switch B. toggle C. flip D. update