B isn't even a possibility. It's a fundamental misunderstanding of the technology upgrade/purchase cycle, and of consumer behavior in general.
Most people don't throw away their computers because they "break and can't be repaired." They throw them away because newer hardware is more powerful and smaller and uses less energy.
When I went home last year my parents had 4 old PC towers of various generations sitting in their basement, they recently took them all to the local dump. All of them were still completely functional. Literally nothing was broken.
Why did they throw them away? Because they were 1/10th the processing power of a modern MacBook and impossible to move around the house. Nobody was using them.
There's mountains of giant plastic PC towers sitting in landfills that were built with the easy to repair/upgrade mindset everybody here is so nostalgic about. It did nothing to save the environment.
A) Company consolidates hardware into a single unrepairable resin block
B) All customers are able to use their devices 50% longer because stuff is repairable
As someone who designes PCBs you could save the world by doing the math here for me and convince me how this is better for the planet than e.g. my fairphone where I can swap out my battery when it is broken instead of throwing the whole assembly away or trying to source parts and removing a glued in battery.
Replacing some component in a computer/phone is something every member of my extended family did within the last 3 years. Usually it was a screen, a battery, a home button, a headphone jack, a hard drive, ... Every instance where they did this they used a piece of electronics longer and thus reduced the carbon footprint more than any single engineering change Apple could have come up with.