Which one of the following would not be counted as part of this year's GDP?

A) The lumber you purchase when building bookshelves for your room.

B) The government bond you buy for your newborn niece.

C) The purchase of a new personal computer that was produced in the current year.

D) The purchase of wheat that was produced in the current year by a Saskatchewan farmer.

E) The purchase of a house that was produced in the current year.

Answer:B

Could u explain why the answer is B, why other choices are wrong? Thank u