Which code fragment when inserted at line ‘// insert code fragment here’, enables the code to successfully change arra elements to uppercase?

Given the fragment: Which code fragment when inserted at line ‘// insert code fragment
here’, enables the code to successfully change arra elements to uppercase?

A.
toUpperCase(); } }

B.
for (int i:arra.length) { for (String x:arra) { arra[i].toUpperCase(); } }

C.
for (int i = 0; i < 3; i++) { for (int j=0; j < 4; j++) { arra[i][j] = arra[i][j].toUpperCase(); } }

D.
String[][] arra = new String[3][]; arra[0] = new String[]{“rose”, “lily”}; arra[1] = new
String[]{“apple”, “berry”,”cherry”,”grapes”}; arra[0] = new String[]{“beans”, “carrot”,”potato”};
for (int i = 0; i < arra.length; i++) { for (int j=0; j < arra[i].length; j++) { arra[i][j] =
arra[i][j].toUpperCase(); } }

E.
for (String a[]:arra[][]) { for (String x:a[]) {

Explanation: