Option C ($305 million) is the correct answer.
Explanation:
GDP = GNP - Net foreign factor income
GNP can be calculated by using the following formula
GNP (FC) = NNP (FC) + depreciation
NNP (FC) = 300, thus the depreciation is as follows:
Depreciation = Gross private domestic investment - Net private domestic investment
= 55 minus 40 = 15
Now, we can calculate GNP (FC) by substituing the values into the formula
GNP (FC) = 300 plus 15 = 315
Now, we can calculate GDP by by substituing the values into the formula.
GDP = 315 minus 10 = 305
Thus, the value of U.S. GDP is $305 billion
Therefore, the correct answer is option C