4 thanks to ceilingcat for another byte
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C is for C, 3636 35 characters → Score: 3736

main(a){for(;++a<28;)putchar;putchar(95+aa+++64)-90;);}

C is for C, 36 characters → Score: 37

main(a){for(;++a<28;)putchar(95+a);}

C is for C, 36 35 characters → Score: 36

main(a){for(;putchar(a+++64)-90;);}
3 C is for C
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C is for C, 36 characters → Score: 37

main(a){for(;++a<28;)putchar(95+a);}

C, 36 characters → Score: 37

main(a){for(;++a<28;)putchar(95+a);}

C is for C, 36 characters → Score: 37

main(a){for(;++a<28;)putchar(95+a);}
2 deleted 2 characters in body
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C, 3836 characters → Score: 3937

main(a){for(a=26;a--;;++a<28;)putchar(122-a95+a);}

C, 38 characters → Score: 39

main(a){for(a=26;a--;)putchar(122-a);}

C, 36 characters → Score: 37

main(a){for(;++a<28;)putchar(95+a);}
1
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