**Answer:**

The correct answer is **option (b).**

**Explanation:**

According to the scenario, the given data are as follows:

Sales = $2,240,000

Contribution margin ratio = 50%

Fixed expenses = $1,008,000

So, First we calculate the contribution margin by using following formula:

**Contribution margin = Contribution margin ratio × Sales**

= 50% × $2,240,000

**= $1,120,000**

So, we can calculate the margin for this investment by using following formula:

**Margin = Net operating income ÷ Sales**

Where, Net operating income = Contribution margin - Fixed expenses

= $1,120,000 -** **$1,008,000

= $112,000

Now by putting the value in the formula, we get

**Margin =** $112,000 ÷ $2,240,000

= 0.05

**= 5%**

Hence, the margin for this investment opportunity is **5%.**