Marla is examining an Apple computer. Under normal circumstances, she can take apart a computer to retrieve the hard drive, but with this Apple computer, she cannot. What are some of the reasons older Apple computers cannot have their hard drives removed? Choose all that apply.

a$.$ Products may feature proprietary screws.

b$.$ Older hard drives are not compatible with newer forensics technology.

c$.$ Older Apple computers may have data encrypted with Apple's T$2$ Security Chip or the native Secure Enclave platform.

d$.$ Older Apple computers have nonstandard components.