The following 4 lines of c++ code, use strings.
string firstname; // define a string object
char lastname[7]; // define a c-string
firstname = "abraham"; // assign a value to the string object
lastname = "lincoln"; // assign a value to the c-string. which of the following statements is /are true?
a) the string object is defined incorrectly because no size is given for it.
b) the 2 strings definitions are correct, but the 2 assignment statements are wrong.
c) the string object is assigned a value correctly, but the c-string is not.
d) the c-string is assigned a value correctly, but the string object is not.
e) all 4 lines of codes are correct.