PLEASE HELP ME!! I'LL GIVE BRAINLIEST!!!!!!!!
Charlotte is an administrative assistant for an accounting firm. She sits near the entrance to the firm and assists walk-in customers along with her other administrative tasks. Where is the BEST place for Charlotte to keep her personal cell phone during the workday?

visible on the surface of her desk

directly next to her computer keyboard

in her purse under the desk

near her notepad and pens at the corner of her desk