Which of the following is an appropriate exposure base for workers compensation

a.

Employment year

b.

Retirement Age

c.

Amount of insurance coverage

d.

Payroll

If the on-level factor for historical period is 1.0784 and the current cumulative rate level index is 1.1687, the average rate level index for historical period is _______

a.

1.1687

b.

1.2603

c.

0.9227

d.

1.0837

Earned exposure for a policy that starts at 1st of October 2020 and ends at 30th of September 2021 according to Calendar year aggregation is______

a.

0.75

b.

0.25

c.

0

d.

1