To change gross income, the most direct option is C) Earn more money. Gross income is defined as the total income earned before any deductions or taxes are applied. This means if you want to increase your gross income, you need to find a way to earn additional income through your job, side gigs, or other sources.
While options like A) Save more per month and D) Increase withholdings might affect your net income or cash flow, they do not change your actual gross income figure. Similarly, B) Reduce deductions pertains to taxable income rather than gross income itself. Therefore, to directly impact gross income, focusing on earning more is the key approach.