How much has the average consumption of calories per day per person changed from the 1960s to present day?

A) From 2,360 calories per day to 2,940 calories per day
B) From 1,536 calories per day to 2,610 calories per day
C) From 3,610 calories per day to 2,940 calories per day
D) From 2,610 calories per day to 1,536 calories per day