Here's a problem to solve: Wild blackberries reproduce asexually by sprouting new roots when stems touch the ground. They also reproduce sexually through their flowers. What is the advantage of the blackberry plant being able to reproduce sexually and asexually?

Among the 4 following options, which is the correct answer?

- A: It allows the plants to grow taller.
 
- B: It produces flowers that attract insects.
 
- C: It produces blackberries that have more flavor.
 
- D: It allows blackberry plants to adapt to new conditions.
 