Answer:
The answer is D. The phrase and the pause enable Roosevelt to emphasize the emotional impact of this tragic loss of life.
Step-by-step explanation:
It is a way of showing "empathy" in a certain way, as when someone dies there aren't any words to describe; the best you can do is to be silent, this is also a respectful way of showing support, sadness, and empathy. This is the case as well, Roosevelt wanted to emphasize how he felt for the loss of lives, as well as having to say it in public. Letter A and B are not possible for this is not a matter of "good speaking" and C isn't possible as well, for he didn't feel responsible for what happened.