Creating Filters

Hello. I am new to programming. I have created a form (shown below) that I want sent to applicants. I have three drop-down lists: Status, LMI, and Structure Type. I want to design the form so that these lists will automatically filter a set of applicants according to their Status, LMI, and Structure Type. What are the steps I need to take to have my drop-down menus filter applicants by these three types? Thank you.

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