If a country puts most of its military effort into building up traditional weaponry and focusing on traditional war tactics, and then is defeated by a foe that mainly uses guerilla tactics, it could be said the country is having trouble with

This type of population includes people who engage in concealed activities and is called

__________. Fill in the blanks with correct word

By the mid-1990s, the Social Security program faced which of the following problems?

A) The expansion of the program, coupled with continuing inflation, had created enormous financial strain on the program. B) Social Security taxes go into a trust fund so that the program can be self-sustaining, but payments to recipients were outpacing the growth of the program's reserves. C) Part of the problem was demographic; compared with when the program started, there were, proportionately, fewer people of working age to pay taxes and more people of retirement age to draw benefits, and this trend was expected to continue. D) All of the above. E) None of the above.