Answer:
The correct answer is option a.
Step-by-step explanation:
GDP is a measure to calculate the production of final goods and services within the geographical boundaries of a nation in a year. It is a tool to measure economic growth in a nation.
In the first statement here the production is taking place within the US boundaries, so this will be included in the US GDP.
In the second statement, there is no transaction taking place so it will not be included in the GDP.
In the third statement, the production of marijuana will not be included in the GDP as it is not legal in the US.