This question seems incomplete. I believe the answer choices to this question are as followed:
O Sugar came to the Caribbean in 1493, and enslaved Africans began arriving in 1510.
O Machines replaced human labor in sugar processing, causing prices to plummet.
O Sugar substitutes were introduced to replace sugar because it was found to be linked to obesity.
O Honey was a common sweetener, but sugar was easier to harvest.
The answer to this question is Honey was a common sweetener, but sugar was easier to harvest. (4th option).