The given question mentions the following facts:
a) In 1958 - Russia's Total spend on public infrastructure = 24% of GDP
b) In 1980 - Russia's Total spend on public infrastructire = 15% of GDP
c) In 1970 - Russia's number of public works projects = 95,000
d) In 1980 - Russia's number of public works projects = 70,000
e) From 1958 to 1980, India increased the spending on infrastructure to 20%
f) From 1958 to 1980, Argentina increased the spending on infrastructure to 12%
Option A - How big a nations's GDP is directly related to number of public works projects the nation commissions - IRRELEVANT - No direct linkage mentioned in the question
Option B - Argentina and India spent more money on infrastructure in 1980 than did Soviet Union - False - Since only % is given and the total amount spent is GDP * % and GDP amount is not given in the question and hence not the correct option
Option C - How much money a nation spends on infrastructure is directly related to the number of public works projects commissioned in that nation - Not Given - The question mentions about the public work project in 1970 and 1980 and the total spend in 1958 and 1980 = although a decreasing trend is given we are not sure of throughout the period and hence not correct
Option D - Both India and Argentina will soon surpass Soviet Union in the number of public works projects commissioned - Out of scope - no such information is mentioned in the question
Option E - Between 1958 and 1980, Soviet Union consistently spent a larger % of its GDP on infrastructure than did Argentina - Correct - since the total % spend of Russia is in the range 12-20% whereas for Argentina, the % increased to its peak of 12% in 1980. Accordingly, this seems correct.