Hello!
It is the FREQUENCY
(sorry for all caps, can’t bold text in mobile haha)
The FREQUENCY is the number of times an event or response occurs; an example in a sentence being :
“The FREQUENCY of cases amongst people has increased since the start of the season.”
This would mean that the amount of times these cases occur is getting larger in proportion to the population/ is becoming more common amongst people.
Hope this helped!
B i think it might be the right answer
B. 1960
On 12 July 1960 France agreed to the Central African Republic becoming fully independent. On 13 August 1960 the Central African Republic became an independent country and David Dacko became its first President