To determine which subscription plan is least expensive per year, we can calculate the unit price for each plan by dividing the total cost by the number of years.
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One-Year Plan: \[ \text{Cost per year} = \frac{24.97}{1} = 24.97 \]
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Two-Year Plan: \[ \text{Cost per year} = \frac{45.94}{2} = 22.97 \]
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Three-Year Plan: \[ \text{Cost per year} = \frac{74.91}{3} = 24.97 \]
Now, let's summarize the costs per year for each plan:
- One-Year Plan: $24.97
- Two-Year Plan: $22.97
- Three-Year Plan: $24.97
The least expensive option per year is the Two-Year Plan at $22.97 per year.
Thus, the correct response is: $45.94 for two years.