The president cannot commit troops to combat longer than 60 days according to which legislation

The answer to this question is War Powers Resolution. War Powers Resolution or also known as War Powers Act is a law that checks the President’s Power / Role before the United States forces to take action. War Power Resolution was enforced on November 7, 1973. In this legislation it allows the President to send the Armed forces when the Congress had declared war.   

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; does not include a reference to the audience;