Finish the following sentence with the best choice: How to plug headphones into a smartphone.

Choices:
- Find the 3.5mm jack on the end of the headphone cord. Plug that into the USB port on the phone.
- Find the 3.5mm jack on the end of the headphone cord. Plug that into the 3.5mm port on the phone.

Answer:
Find the 3.5mm jack on the end of the headphone cord. Plug that into the 3.5mm port on the phone.