Once the seatbelt is fastened, you should...

A)loosen the abdominal area for greater comfort.
B)use a clip to adjust it.
C)check that it is properly positioned and fitted to the body.Correct
Once the seatbelt is fastened, pull it slightly upward so that it fits snugly against your body. Check that it is not caught or twisted at any point along its path.

It is important that the seatbelt provides effective protection, and for this it must be in perfect condition and correctly positioned:
- The chest strap must pass over the collarbone and the centre of the chest.
- The abdominal strap must lie over the pelvis and hip bones.
- It must be worn close to the body (the use of clips is prohibited) and you should avoid driving in bulky clothing, as this reduces effectiveness.
- During pregnancy, it is also effective.

The submarining effect is one of the greatest risks caused by improper use of the seatbelt. This effect occurs when the seatbelt is unable to restrain the driver during an accident and their body slides under the abdominal strap.
To avoid this, you should not place anything on the seat (towels, cushions, etc.) and should properly adjust the seat and seatbelt (do not recline the seat excessively or drive in a reclined position).