Howar's organization purchased laptops with windows $10$ home preinstalled, and he is tasked with upgrading these computers to windows $10$ pro. Along with the OEM installation of window $10,$ he notices that several additional software is installed by the vendor. He performs a clean installation on these computers. Which of the following is true in this scenario?

a$.$ the hard drive of the computers will be wiped before installation.

b$.$ Howard will not be able to use DVD boot installation in this scenario.

c$.$ The software will be retained in the fresh installation of windows ${10}_{{?}_{?}}$

d$.$ A clean installation and upgrade installation are indistinguishable in this scenario