The predicate is tipped his hat.
Assuming you're referring to what you typed, it would be informal.
The answer is A. textbook.
<span>Rena’s father asks Andrzej to take her to safety in Slovakia, and he agrees to do so. I think this best summarizes the excerpt. The father and mother are very concerned for their daughter's safety in Auschwitz (assuming that they are Jewish) and want to get her out of Germany to a safe country.</span>
Answer: The answer is (D)
Explanation: Many people study better by themselves, and for Christopher to go to a study group. That could cause Christopher to learn a new way of studying. Which would not be good if the test is coming up.
