The answer is the second one (B): fiscal; monetary.
Explanation for each option:
A. Active; passive - This option does not relate to the concepts of inside and outside lags in economic policy.
B. Fiscal; monetary - This is the correct answer. A long inside lag is more of a problem for fiscal policy because it takes time for government decisions to be made and implemented (e.g., passing legislation). A long outside lag is more of a problem for monetary policy because, once implemented, it takes time for changes in interest rates to affect the economy.
C. Monetary; fiscal - This is incorrect because monetary policy typically has a shorter inside lag but a longer outside lag, while fiscal policy has a longer inside lag.
D. Passive; active - Similar to option A, this does not directly relate to the concepts of inside and outside lags in economic policy.
In summary, the correct answer is that a long inside lag is more of a problem for U.S. fiscal policy, whereas a long outside lag is more of a problem for U.S. monetary policy.