Which of the following antibiotics does Publix offer at no cost?

The correct choice indicates that Publix offers an antibiotic at no cost, which in this case is Ciprofloxacin. This antibiotic is typically included in programs where certain medications are provided for free to improve community health and accessibility. Such programs often focus on commonly prescribed antibiotics which can help prevent the development of resistance and increase adherence to treatment among patients.

Ciprofloxacin is widely used for various bacterial infections, and by making it available at no cost, Publix is enabling easier access for patients who may not afford their medications otherwise. This effort not only benefits individual patients but also public health by ensuring that necessary treatments are accessed when needed.

The other antibiotics listed may not be part of this specific no-cost program, as policies around medications can vary by provider and location, but they do not carry the same standing in this context as Ciprofloxacin does within Publix's offerings.