Assuming that if multiple instances of any one of those targets, appeared in the same line, they should all be replaced:
s[(%(?:EX|EC|BC)\%)][TOdelete]g, print while <DATA>; ## Adjusted
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.