a. To record revenue earned that was previously received as cash in advance. b. To record wages expense incurred but not yet paid or recorded. c. To record revenue earned but not yet billed or recorded. d. To record expiration of prepaid insurance. e. To record annual depreciation expense.

The believe the answer is a.

Answer/// (a)/// set smaller, more specific goals;

With reference to the solutions, following things may be noted1) homogeneous solutions comprises of single phase.2) heterogeneous solution comprises of more than one phase.3) in colloidal solution, solute is evenly distributed in solvent. in such system, it is difficult to separate solute and solvent.4) in suspension, there is an uneven distribution of solute in solvent. in such system, solute and solvent gets separated on standing long.    blood is a homogeneous and colloidal solution,salad dressing is a heterogeneous and suspension solution.