The provides access to the internet may also be internal.

The modem provides access to the Internet may also be internal.modem is is The modem is a hardware device- a translator which is one of the most common computer peripherals. The name "Modem" comes from  "Modulator / Demodulator." The modem converts or "modulates" an analog signal from a telephone or cable wire to a digital signal that a computer can recognize and similarly, it converts outgoing digital data from a computer or other device to an analog signal.

answer; i believe the correct answer is (a) all trenches must have access/egress;

yes the ansewer is c bc you can look it up!