To convert the number \(1.959 \times 10^{-4}\) into standard form, you move the decimal point four places to the left because of the negative exponent.
Starting with \(1.959\):
- Move the decimal point one place left: \(0.1959\)
- Move the decimal point two places left: \(0.01959\)
- Move the decimal point three places left: \(0.001959\)
- Move the decimal point four places left: \(0.0001959\)
So, \(1.959 \times 10^{-4} = 0.0001959\).
Thus, the correct answer is C. \(0.0001959\).