Answer:
a. follows a monetary policy rule.
Step-by-step explanation:
Crowind out refers to the activity of the governemnt in a market in such a manner that impact the rest of the market whether by supply or demand.
The centrla bank should look whether the LM is more close to horizontal formtherefore, full multiplier effect on the government multiplier and no change associate with the interest rate making no crowind-out effect or as littler as possible when the LM line is almost horizontal.
But, when the LM line is vertical or almost vertical the spending will have no impact in the ouput. Hence it will only acomplish the crowind out effect as it removes loanable fund from private sector making the interest rate increase