A Company Sells Titanium to a Bicycle Company for $300

A company sells titanium to a bicycle company for $300. The bicycle company uses the titanium to produce a bicycle, which it sells for $400. Taken together, these two transactions contribute

A) $300 to GDP.
B) $400 to GDP.
C) between $400 and $700 to GDP, depending on the profit earned by the bicycle company when it sold the bicycle.
D) $100 to GDP.