In $2025,$ I contribute $$20,000$ to a traditional account. $$This is my only contribution. $$In $2035,$ my traditional account is now worth $$30,000($due to investment earnings$).$In $2035,$ I withdraw $$30,000$ from this traditional account. $$How will this withdrawal be taxes?

Question $12$ options:

a$.$I will pay taxes on the $$10,000$ profit

b$.$I will pay taxes on the $$20,000$ initial contribution

c$.$I will pay taxes on the $$30,000$ withdrawn