Answer:
a. 3 Importing data Into checkbox fields allows for the use of TRUE/FALSE.
b. E Field-Level Security access determines which fields will be visible.
c. 0 Unrestricted picklists, a new picklist value will be applied but will not be added to the picklist.
Explanation:
The true/false use is definitely allowed while importing data into the checkbox fields. Also field level security decides the fields that will be visible to all, and the restricted picklists, a new picklist value is never set to the default value. However, in case of the unrestricted picklists, a new picklist value is definitely going to be applied however, it will not be added to the picklist. And there is no option to stop the validation rules from executing while importing the data. Hence, the above answer.
