Final answer:
Erythromycin is the antibiotic most commonly given to clients with acne.
Step-by-step explanation:
The antibiotic most commonly given to clients with acne is Erythromycin (option d). Antibiotics like Erythromycin can be used to treat moderate acne alongside other treatments like acne creams and hormones. They work by inhibiting the growth of bacteria on the skin that contribute to acne.