PO participation at Daily Scrum?

Hello,

I found the following question in the Scrum Master Training Manual:

The Scrum Master realizes that Product Owner attends all Daily Scrums and asks Team
Members about their tasks and gives them directions for the following day. What
should the Scrum Master do?

A. It’s wrong, the Product Owner should not attend Daily Scrum

B. It’s wrong, the Product Owner should not speak in Daily Scrum

C. It’s OK, the Product Owner can do this

D. It’s OK, it’s recommended for the Product Owner to give direction

According to the Training Manual the correct Answer is B.

But the Scrum Guide states on page 10:
"The Scrum Master enforces the rule that only Development Team members participate in the Daily Scrum."

So am I right that the right answer is A.?
What do you think?

Best regards,
Frank