Which of the Following Will Increase This Year's GDP

Which of the following will increase this year's GDP?

A) the sale of a used economics textbook to the college bookstore
B) family lawn services provided by a 16-year-old son or daughter
C) $60,000 of income earned by an American college professor teaching in England
D) a $100 sales commission to a broker for a purchase of 100 shares of stock
E) $10 billion of damage caused by a hurricane that hit the coast of Florida