I am unable to see the exact choices you are supplied with, but frank refers to saying or establishing something sincerely and bluntly.
Elizabeth || is the current Queen of England
B. Because an invasion of japan's mainland would have meant the loss of thousands of American lives, many analyst's discussed it and said between 500,000 - 1 million lives could have been lost during the invasion due to how dug in and defended Japan would have been. Including their miles and miles of underground tunnels