Answer:
A. manufacturers
Explanation:
It's not B. because it'd be weird if the consumers made commercials for stuff, they might help, but they do not make them. And it's not government agencies... no.. they are far too important!!! And medical researchers participate in some commercials (about medicine, most likely) but they don't make them.
May I please have Brainliest??!!!
- ElizabethKate
