Which of the following best describes how development costs should be

accounted for? $($Select the best answer.$)$

a$.$ Development costs of internally used software may be capitalized, if they were

incurred during the application development stage

b$.$ Development costs are capitalized when technical and economic feasibility of a

project is reached

c$.$ Costs to develop computer software for external use are expensed

d$.$ Regardless of the type of cost and industry, development costs are expensed