Hong Securities Has $300,000 to Invest in Four Stocks and Three

Multiple Choice

Hong Securities has $300,000 to invest in four stocks and three bonds.X₁, X₂, X₃, and X₄ denote the amounts invested in each of the stocks, and Y₁, Y₂, and Y₃ equal the amounts invested in each of the three bonds.Which of the following shows that at least 40% of the investment in stocks must be in stock 1?

A) X₁ $\ge$ 120,000
B) X₁ - .4X₂ -.4X₃ - .4X₄ $\ge$ 0
C) .6X₁ - .4X₂ - .4X₃ - .4X₄ $\ge$ 0
D) X₁ $\ge$ .4(X₂ + X₃ + X₄ + Y₁ + Y₂ + Y₃)