Final answer:
Magnolia Bakery led off the cupcake bakery trend because it was the first cupcake bakery and offered delicious and unique flavor combinations.
Step-by-step explanation:
Magnolia Bakery led off the cupcake bakery trend because it was the first cupcake bakery. It gained popularity for its delicious and unique flavor combinations, which attracted customers. Additionally, its location in New York City allowed it to be exposed to a large customer base.
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