$T=2\mathrm{.}0s.$ If s scond icentical block is glued to the top of the firstblok, heneresp priod will be

A$)1\mathrm{.}0$ s

B$)14$

$285$

D$)2\mathrm{.}0$ s

E$4\mathrm{.}0\mathrm{.}5$

OA

oE

oC

OB

OD