A $1\mathrm{.}0-kg$ block oscillates with a frequency of $10$ Hz at the end of a certain spring. The spring is then cut into two hatves. The $1\mathrm{.}0-kg$ block is then made to oscillate at the end of one of the halves. What is the frequency of oscillation of the block?

A$)20$ Hz

B$)40$ Hz

C$)51$ tz

D$)10$ Hz

E$)14$ Hz