Before being simplified, the instructions for computing income tax in Country \(R\) were to add \(2\) percent of one's annual income to the average (arithmetic mean) of \(100\) units of Country \(R\)'s currency and \(1\) percent of one's annual income. Which of the following represents the simplified formula for computing the income tax in Country \(R\)'s currency, for a person in that country whose annual income is \(I?\)

A. \(50 + \dfrac{I}{200}\)

B. \(50 + \dfrac{3I}{100}\)

C. \(50 + \dfrac{I}{40}\)

D. \(100 + \dfrac{I}{50}\)

E. \(100 + \dfrac{3I}{100}\)

[spoiler]OA=C[/spoiler]

Source: GMAT Prep