What is the primary advantage of a Distributorless Ignition System (DIS) compared to a conventional mechanical distributor-type ignition system?

1. It uses a single ignition coil to supply spark to all cylinders sequentially.
2. It eliminates moving parts like the rotor and distributor cap, reducing mechanical wear and spark timing drift.
3. It operates at a lower primary voltage, reducing coil heat.
4. It does not require spark plugs in the cylinder head.