What two factors must be considered when replacing old RAM modules in a PC (Choose two.)?

When replacing old RAM modules in a PC, two key factors to consider are compatibility and capacity. Compatibility involves ensuring that the new RAM is compatible with the motherboard, including the correct type (e.g., DDR4, DDR5) and speed. Capacity refers to the amount of RAM being installed, which should align with the system's maximum supported memory and the user's needs for performance.