The rollowing conditions are suggestive of the types of situations where self$-$insurance by a business is possible and feasible, except:

a$.$ the firm should have a sufficient number of objects so situated that the objects are not subject to simultaneous destruction,

b$.$ the firm must hire an outside company to administer the plan and manage the self$-$insurance fund in order to ensure objectivity,

c$.$ the firm must have accurate records or have access to satisfactory statistics to enable it to make good estimates of expected losses,

d$.$ the general financial condition of the firm should be satisfactory and the firm's management must be willing and able to deal with large and unusual losses.