Which statement is true about operating gearing?

a.Operating gearing is the relationship between the total fixed and the total variable costs for some activity.

b.If a company with low operating gearing can double its output, its profit will increase by a higher factor than if it had high operating gearing.

c.If fixed costs are relatively high compared to variable costs, the company has low operating gearing.

d.Capital-intensive activities have lower operational gearing than labour-intensive activities.