Clear D.
E - cannot be assumption. If it were an assumption, then total number of days worked last week will be 4, which contradicts the premise - john works 5 days a week unless that week has national holiday or he is on vacation.
E - cannot be assumption. If it were an assumption, then total number of days worked last week will be 4, which contradicts the premise - john works 5 days a week unless that week has national holiday or he is on vacation.
