Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

An oil and gas exploration and production company announces that it is offering 30 million shares to the public at $45.50 each. This transaction is most likely a sale in the:
Option A:futures market.
Option B:primary market.
Option C:secondary market.

Answer: B