Interpreting Financial News (Provide a brief interpretation / explanation of the following quotes)

A. The Treasury yield curve has inverted for the first time in over a decade

B. even bonds with the same time until maturity can have different levels of interest rate risk

C. interest rates have been extremely volatile, making bonds with more convexity relatively more attractive than bonds with low convexity

D. ...preferred stock with a par value of $50, a dividend of 7%, and is cumulative, was purchased 3 years ago. For the past 2 years NO dividends have been paid for the past 2 years. The rate on similar preferred stocks is now 10%. If the company has rebounded, what would each preferred share receive as a dividend this year? What is the current price of the stock?