Question

which sentence best uses a split infinitive to clearly emphasize the message of safe driving?
before getting behind the wheel, young drivers must remember not to text.
young drivers must remember to narrow their focus fully when they get behind the wheel.
young drivers must remember to always turn off cell phones before getting behind the wheel.
when driving a car, young drivers need to most importantly remember to completely ignore their phones.

Explanation:

A split - infinitive is when a word or phrase comes between 'to' and the verb in an infinitive. In the third option "to always turn off", "always" splits the infinitive "to turn off". It clearly emphasizes the message of always turning off cell phones for safe driving.

Answer:

Young drivers must remember to always turn off cell phones before getting behind the wheel.