Answer:
The correct answer would be, Partner with an older, well connected socialite couple to endorse the brand.
Explanation:
As Rachael is the owner of the watchmaking company and has the authority to change the marketing strategies and mixes for the brand. She decides to totally change the target market for her brand. She now focuses on old wealthy, craftsman who seek quality. So now she needs to promote her new marketing mix, to target her new market. So for this, the best strategy which she can use in support of her marketing mix would be to make an older well connected socialite couple, her partner, to promote and endorse her brand. This will help her promote her new exclusive collection and can target the old wealthy quality seekers easily.