The answer is B: Producing a large number of eggs.
Explanation for each option:
A. Having eggs that attract predators - This is incorrect because attracting predators would decrease the chances of survival for the eggs, thus reducing the likelihood of successful reproduction.
B. Producing a large number of eggs - This is correct because by producing many eggs, sea turtles increase the probability that at least some of their offspring will survive to adulthood, despite the presence of many natural predators.
C. Spending years caring for offspring - This is incorrect for sea turtles, as they do not exhibit parental care after laying eggs. Sea turtles lay their eggs on beaches and then return to the sea, leaving the eggs to hatch and the young to fend for themselves.
D. Caring for one offspring at a time - This is incorrect because sea turtles do not care for their offspring individually. Their reproductive strategy relies on producing many eggs at once rather than investing in the care of individual offspring.
In summary, the adaptation that helps sea turtles successfully reproduce is producing a large number of eggs, which increases the likelihood that some will survive despite predation.