The correct expression below is: [My elder sister bought a bouquet of roses from the florist.]

姐姐有花店里买了一束玫瑰。 jiějiě yǒu huā diàn lǐ mǎile yī shù méiguī
姐姐是花店里买了一束玫瑰。 jiějiě shì huā diàn lǐ mǎile yī shù méiguī
姐姐在花店里买了一束玫瑰。 jiějiě zài huā diàn lǐ mǎile yī shù méiguī
None of the above