Why according to the Scrum framework, it is d fficult for product owners to make changes to a spent that is underwoy?

Because the team needs to be able to limit the authority of the product owner

Because asking the team to make d real commtment comes with an assocated cost of not shifting the buss of the commitments in mid$-$sprint.

Because the team and product owner want to keep upper management in the dark about planned ctangr.

Because it provides an incentre for the product owner to attend the meetings