The sum of 3 fifthteens and 17 fifthteens is 20 fifthteens and 20 fifthteens is expressed as (20 x 15)=300
"b. Historical evidence" would be the historical term that describes the specific primary and secondary sources that historians use to support their claims, since historians always try to back up their arguments.
My answer would be yes, the Committee of Public Safety protected the Revolution from its enemies. It enabled to put country under threat of death penalty to work together. How beneficial was Committee of Public Safety to the revolution was already debated in 1790's; however, it is necessary to say that it was a collective dictatorship in the time of need when country faced civil wars, external invasion, and counter-revolution.
