If the difference between the roots of the equation \( x^{2}+m x+1=0 \) is less than 0 then the set of possible values of \( m \) is-

A \( \mathrm{m} \in(-2,2) \)

B \( \mathrm{m} \in(-3,3) \)

C \( \mathrm{m} \in[-2,2] \)