Who did Ferdinand and Isabella replace as the rulers of most of Spain? a
Muslim forces from north Africa
b
French forces led by Charles Martel
c
Russian forces under the leadership of Ivan the Great
d
The Holy Roman Empire led by Charlemagne

D

Explanation:

I hope this helped alot

i know social security wasn't one.

explanation:

hope my answer has you!

the correct answer is d. the monetary reserve is a set of funds represented in currency, money or similar, saved as a forecast of possible needs or for legal reasons.

the increase or decrease in the monetary base influences in the increase or decrease of the inflation rate. therefore, the excess of monetary reserve will cause the reduction of inflation.