Whichof the following statement describes a weakness in the following code?

FILE Ip; int a,b,c; fopen ("file", "r"); while (!feof (fp)) 1 // process a, b, c, fscanf (fp, "od", \&a, \&b, \&b) ; \} a. There may be runtime errors if there are additional read statements from the input file inside the loop. b. The code is not portable because the feof() function may be different for each compiler and system c. The feof() function call is very slow and takes too much processing time d. All of the above e. None of the above (that is, using the feof() function in this way is the best and most correct way