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Which line of code contains a syntax error? int main() { string usrName; || A) char usrOption; // B) usrName = "Travis Jones"; // C) usrOption = a; || D) Il main code return 0; } Select one: O a. string usrName; O b. char usrOption; O c. usrName = "Travis Jones": O d. usrOption = "a"; What is the output of the following code? int main() { int x = 5; int y = 6; int z = 2; X = x + y; y = x - 2; cout