Which of the following sentences properly uses semicolons with conjunctive adverbs?

a Washing your face with a gentle cleanser is a good start to a skin care routine; additionally, a moisturizing sunscreen should always be part of your daily routine.
b Washing your face with a gentle cleanser is a good start to a skin care routine; additionally; a moisturizing sunscreen should always be part of your daily routine.
c Washing your face with a gentle cleanser is a good start to a skin care routine, additionally; a moisturizing sunscreen should always be part of your daily routine.
d Washing your face with a gentle cleanser is a good start to a skin care routine. Additionally; a moisturizing sunscreen should always be part of your daily routine.

a Washing your face with a gentle cleanser is a good start to a skin care routine; additionally, a moisturizing sunscreen should always be part of your daily routine.