A salon owner wants to send a promotional email for a new anti-aging facial service. To maximize the campaign's effectiveness and return on investment, which of the following is the best segmentation strategy for the email list?
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A
Sending the email to all clients on the list to ensure maximum reach.
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B
Segmenting the list to target only clients who have purchased retail products in the last year.
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C
Segmenting the list based on clients' age (e.g., 35 and older) and previous history of purchasing similar skincare services.
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D
Targeting only new clients who have visited the salon just once in the past six months.