How much time must a Product Owner spend with the Developers? (Choose the best answer)

How much time must a Product Owner spend with the Developers? (Choose the best answer)
A . 40%, or more if the stakeholders agree.
B . Enough so that the Product Owner is confident the Increment will meet the intended value.
C . As much time as the Developers tell the Product Owner to be present.
D . 100%

Answer: B