Comprehensive and Detailed Explanation:
Independent contractors do NOT receive a salary. They:
Invoice for services rendered rather than receiving fixed wages.
Risk profit or loss (Option B) based on how they manage expenses.
Can hire assistants (Option C) to help complete tasks.
Can end the relationship at any time (Option D) unless bound by a contract.
Option A (Receive a salary) is incorrect because salaries are paid only to employees, not independent contractors.
Reference:
IRS - Independent Contractor vs. Employee Classification
Payroll.org - Guidelines for Contractor Payments and Taxation