At what stage of the creative process would a designer determine the target audience for a project?

The stage of the creative process that a designer would determine the target audience for a project is : at the Planning Stage

The Planning Stage involves determining the plan for the whole project and it involves knowing your target audience. You have to know your market or audience so you will know in what manner you will need to execute your marketing strategy. This will help you sell your product effectively in business and will make your audience satisfied if you are talking about media and presentation.

i am pretty sure it is d.

its d i know cause i've been googling it