Given that string[] str has been initialized, to get a copy of str[0] with all characters converted to upper case, use the following statement:
a. str[0].touppercase();
b. str. touppercase();
c. str[0].uppercase();
d. str. uppercase();

str[0].toUpperCase();

Explanation:

str[0] is pointing to the first character of the entire string and the code str[0].toUpperCase() will convert the characters to upper case if they are in lowercase and will remain unchanged if they are already in upper case.

answer; i believe the correct answer is ( a expression) plz check first.good luck